Why Don't Other Animals Wear Glasses?
Check out The Great Courses Plus: http://ow.ly/OE9y301cRfI Don't miss our next video! SUBSCRIBE! ▻▻ http://bit.ly/iotbs_sub ↓ More info and sources below ↓ Get yourself an awesome...
==========
[MUSIC] This episode is supported by The Great Courses Plus [MUSIC] I’ve never seen a gorilla with glasses, a chameleon with contacts, or a moose with a monocle. Although I did see a spectacled bear once. But like 7 out of 10 Americans, my eyes don’t bend light correctly, so I’ve worn glasses since fifth grade. It’s a confusing question: How did our species survive the trials of natural selection if so many of us can’t see? We can’t take otters or ostriches to the ophthalmologist, so it’s hard to know exactly how common bad eyesight is in the animal kingdom. But if you can smell, hear, or feel your way through life, good eyes are expendable. Many species that rely on seeing sacrifice clear vision all over to see extra-sharp where natural selec...
==========
[MUSIC] This episode is supported by The Great Courses Plus [MUSIC] I’ve never seen a gorilla with glasses, a chameleon with contacts, or a moose with a monocle. Although I did see a spectacled bear once. But like 7 out of 10 Americans, my eyes don’t bend light correctly, so I’ve worn glasses since fifth grade. It’s a confusing question: How did our species survive the trials of natural selection if so many of us can’t see? We can’t take otters or ostriches to the ophthalmologist, so it’s hard to know exactly how common bad eyesight is in the animal kingdom. But if you can smell, hear, or feel your way through life, good eyes are expendable. Many species that rely on seeing sacrifice clear vision all over to see extra-sharp where natural selec...
