Our empathy for other organisms decreases the further they are removed from us on the tree of life. Photography can change this perception.
If we were to use electrodes to extract energy from ourselves, we would collapse because we would have nothing left to keep our hearts beating.
The sclera, known for its color as «the white part of the eye», is an opaque, resistant, and fibrous membrane that covers part of the eyeball, giving it shape and protecting its interior.
Blushing is a specifically human characteristic, since our closest relatives, such as the chimpanzee, gorilla, or orangutan, do not blush.