What are Those Floaty Things in Your Eye? Fact Show 8

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they say curiosity killed the cat but
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it's natural to want to find out more
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about the world around us after all
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that's probably why you're watching this
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video in the first place right rest
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assured these weird and wonderful
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nuggets of information are sure to
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satisfy that craving for now just sit
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back and allow me to amaze you why are
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there stones on railway tracks here's a
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clue they're not just for aesthetic
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purposes and they actually have an
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official name a ballast it's still no
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idea it's all part of a clever system
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designed to hold everything in place
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while up to 1 million pounds of pure
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power hurdle over the tracks above you
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see laying miles of steel tracks
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directly onto the ground would be a
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total engineering nightmare it would be
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subject to all sorts of external risk
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factors including heat expansion and
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contraction ground vibration
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precipitation build-up and bad weather
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and plant growth from beneath the
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ballast is part of a clever solution to
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this problem that has been in place for
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over 200 years now first a foundation is
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built to prevent flooding on the tracks
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then a load of crushed stone is
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deposited on top next a line of wooden
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beams or ties is laid followed by more
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stones their sharp edges stop them from
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rolling over each other and that helps
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to hold everything in place when the
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steel rails are laid in the end on top
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the ballast distributes the load of the
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ties which in turn supports the load of
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the Train on the tracks the tracks
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themselves are only held together by
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clips because bolts would buckle and
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break thanks to heat expansion there you
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have it a centuries-old process that
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facilitates movement over thousands of
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miles with the help of a few stones
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what are those floaty things in your eye
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we've all seen them at some point those
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little squiggly translucent worms that
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seem to float across your field of
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vision but what are they
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the thing is they seem to dart away the
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moment you try and focus on them which
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means figuring out what they actually
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are is pretty darn difficult rest
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assured they're not really alive they're
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officially known as eye floaters and the
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good news
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is there you can just totally ignore
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that most of the time most floaters are
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small flecks of a protein called
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collagen which is part of a gel-like
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substance in the back of your eye called
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the vitreous as you get older the
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protein fibers that make up the vitreous
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shrink down to little shreds that clump
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together the shadows these fibers cast
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on your retina the light-sensitive
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tissue at the back of your eye is what
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causes the floaters to appear floaters
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can appear at any age but you're more
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likely to start noticing them between
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the age of 50 and 75 still it's better
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than actually having tiny worms swimming
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around in your eyes
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in ancient Greece throwing an apple at a
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woman was considered a marriage proposal
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popping the question these days involves
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two key things getting down on one knee
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and flashing a pricey rock but in
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ancient Greece all you really needed to
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do was reach for the nearest fruit bowl
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to find out where the whole apple
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throwing thing first started let's turn
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to the pages of Homer's Iliad Eris the
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goddess of discord was pretty peeved
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that she hadn't been invited to Pelisson
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thetas wedding so she decided to do what
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any logical woman would throw a golden
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apple into the wedding party the apple
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bore the inscription for the most
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beautiful one so of course the scuffle
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broke out between the three goddesses at
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the wedding over who could grab it first
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eventually it was left to Paris of Troy
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to pick a winner you know the guy who
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started the whole Trojan War because he
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was chasing a married woman the
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goddesses all tried to bribe him but it
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was Aphrodite who promised the best
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reward a certain Helen of Sparta and no
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one could beat that since then it was
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considered sacred to Aphrodite to throw
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an apple as a declaration of love and to
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catch it as a symbol of acceptance what
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do you think should this long-lost
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custom make a comeback apples are much
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cheaper than engagement rings after all
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Napoleon was once attacked by a pack of
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rabbits after signing the treaties of
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Tilsit which marked the end of the war
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between Russia and France and July 1807
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Napoleon was in the mood for his
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celebration instead of reaching for a
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pinata our just cracking open a cold one
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with the boys he called for a full-blown
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hunting party Napoleon asked his chief
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of staff alexandria Bertier to traipse
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him around the countryside and round up
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some bunnies
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but little did he know it would come
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back to bite em literally birthday
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reportedly collected somewhere between
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several hundred and three thousand
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rabbits stuck them in a cage in a field
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and prepared to release them but when
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the rabbits were set free
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they didn't just scamper away they
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charged in the direction of the hunting
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party instead at first it all seemed
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pretty funny but in no time the bunnies
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had completely swarmed Napoleon causing
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him to seek refuge in his carriage which
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was also quickly surrounded by the
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critters besieged and out numbered the
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party had no choice but to wave their
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white flag and retreat from their fluffy
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adversaries apparently birthday was kind
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of lazy and just bought the rabbits from
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local farmers instead which meant they
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certainly weren't afraid of humans
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especially ones its shortest Napoleon
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where public toilets u-shaped today on
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things you never noticed before but
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totally will now public and private
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toilets are shaped differently before
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you go looking for square shaped public
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toilets I'm really only talking about
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the seats specifically public toilets
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have open-ended u-shaped seats while the
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one in your bathroom at home probably
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has a seat which goes all the way around
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you might assume that using less plastic
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is more cost-effective for public
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restrooms but there's actually a more
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important reason for this difference
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hygiene two-pronged open fronted toilet
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seats are actually required by the
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plumbing codes adopted by most public
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authorities in the US that's because if
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you're a dude the u-shaped seat gives
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you a little more breathing room which
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means you're less likely to touch the
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seat with your junk it also means
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there's one less area you could
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accidentally splash pee on and it gives
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the ladies a more comfortable wiping
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experience at the same time the more you
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know right why do cats BLAP if you're a
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cat owner you might understand what I'm
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talking about here if you have
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absolutely no idea though
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a blip as the Internet has kindly named
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it looks a little something like this
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basically if your cat sticks its tongue
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out and forgets to put it back in its
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mouth it's blipping it might look
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totally unintentional
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not to mention outrageously adorable but
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science says otherwise
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according to animal behavior consultant
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and cat expert Amie shojai epping is
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actually related to the way cats
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investigate their surroundings the
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scientific name for this mouths a gape
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face is the phlegm in response which
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cats used to collect pheromones
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Matan when these are transferred to the
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internal sent mechanism or vomeronasal
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organ on the roof of their mouth they
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can detect the sexual status or other
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information about other cats pretty much
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any interesting scent can be explored by
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bluffing
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that means that when your cat looks like
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it's forgotten how its tongue works it's
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actually just being a fluffy little
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detective
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why isn't Disneyworld overrun by
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mosquitoes Disneyworld might be the most
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magical place on earth and part of that
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magic is that you're unlikely to leave
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the park with a single mosquito bite
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because there aren't any mosquitoes
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there Disneyworld is located slap-bang
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in the middle of swampy Florida which
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should be teeming with flying insects
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but there's a smooth undercover
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operation called the mosquito
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surveillance program in place to keep
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them at bay firstly there are carbon
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dioxide traps all over the park once
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they catch bugs the team can quickly
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analyze how best to eradicate the
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population Disney has another secret
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weapon though an army of sentinel
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chickens while the birds go about their
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daily lives and coops all over disney
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world their blood is constantly
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monitored for mosquito-borne diseases
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like West Nile virus although the
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chickens can't actually get sick the
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Disney team can use the chickens to
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locate the offending insects and deliver
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a swift blow to wipe them out there's a
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caterpillar that freezes itself solid
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the frozen Arctic probably isn't the
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ideal environment for a caterpillar
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unless you're a woolly bear caterpillar
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that is this bizarre creepy crawly
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starts feeding on vegetation the moment
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it hatches in autumn but by the time the
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Arctic winter hits the inevitable
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happens it freezes solid now for most
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animals including humans that would be
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game over but when spring finally comes
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back around the caterpillar defrost and
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continues munching away like nothing
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ever happened it does this by producing
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cryoprotectant in its tissues which
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allows it to freeze its heart followed
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by its gut and finally its blood some
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winters in the Arctic can last 11 months
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which means it will thaw neat for just
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one month before freezing again although
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some woolly bears have been known to
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survive as many as 14 winters when they
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finally met a Morpha size into the tiger
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moth they ironically have only a few
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days to find a mate before they die
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seems like a bum deal to me
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how do astronauts scratch their noses
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being an astronaut comes with its own
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set of unique challenges but something
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you might not have thought about is how
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to scratch an annoying itch when you're
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covered head to toe in a bulky space
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suit surprisingly astronauts do have a
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few options when it comes to nose
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scratching
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in fact most space helmets have a small
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patch of velcro on the inside for this
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very purpose besides this the helmets
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are also fitted with a foam block known
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as a valsalva device which astronauts
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used to block their noses when they
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readjust pressure this block can also
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come in handy as an improvised
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scratching post in times of need in 2011
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endeavour Shuttle astronaut Andrew
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futsal found himself in a rather sticky
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situation when some of the chemical used
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to prevent fogging inside the helmet got
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in his eye thankfully he was able to use
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the ball Sava device to relieve the
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irritation and continued his spacewalk
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next time you have an annoying itch just
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think it could be worse how long should
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you dunk an Oreo no matter what you say
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Oreos were made for dunking but if you
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want the optimum treat eating experience
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how long should you dunk for and 2016
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members of Utah State University splash
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lab conducted a very serious experiment
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to find out the team held cookies half
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way and 2% milk for increments from half
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a second to seven seconds and weighed
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the Oreos to measure how much milk had
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been absorbed in just one second the
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Oreos absorbed 50% of their potential
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liquid weight which had increased to 80
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percent in two seconds the number then
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flatlined for one second until the
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cookie had absorbed all of its potential
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milk within four seconds what does that
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mean for other dunking aficionados out
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there basically holding your Oreo and
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milk for any more than five seconds
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won't allow it to absorb any more milk
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it'll just go soggy and drop off into
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the glass which no one wants three
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seconds is more than enough to saturate
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the cookie and any more risk-taking
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might cost you your precious Oreo a
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woman drilled a hole in her head to gain
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superpowers what if I said you could
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give yourself superpowers without being
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bitten by a radioactive spider sounds
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good right all you have to do is drill a
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hole in your own skull
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I'll pass thanks believe it or not
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that's exactly what British woman Amanda
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Fielding did way back in 1970 and she
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lived to tell the tale
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before taking an electric drill to her
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own skull Feldon got herself all clued
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up on the ancient practice of
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trepanation which claims that the old
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hole in the head trick is a gateway to
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higher consciousness the idea is that
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blood flow to the brain is reduced when
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the cranial bones fuse during infancy
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meaning that as adults we have a limited
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capacity for knowledge and understanding
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Fielding believed that creating a
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calculated opening in the skull would
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act as a release valve to restore a
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greater flow of blood and cerebrospinal
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fluid to the brain and the film
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heartbeat in the brain Fielding
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documented her own trepanation on camera
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although she lost nearly a pint of blood
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she wrapped her head in a scarf ate a
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steak to replace lost iron and then went
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out to a party fifty years later there's
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still no medical evidence to support
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these claims about trepanation and as
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far as I know no one has seen Amanda
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fielding flying or shooting laser beams
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from her eyes just yet do you have a
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random fact that you think will impress
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me let me know in the comments below and
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as always thanks for watching