The reflexes of the eye are automatic adjustments your eyes make to help you see and keep them from being damaged. They can respond to light and dark, adjusting how much light enters the retina.

This quick visual challenge will reveal whether you truly have the detail-oriented mind most people only wish they had.

Source: Bert de Tilly, via Wikimedia Commons. Distributed under a CC BY-SA 4.0 license. Since the 1970s, scientists have employed the mirror test as an assay of self-awareness. If an animal or child ...

It’s almost automatic—if you notice a smudge when you look in the mirror, you wipe it off. Seems simple, but only a few particularly clever species such as orangutans and dolphins share this ability ...

Wild baboons failed to demonstrate visual self-recognition in a test carried out by anthropologists. Published today in Proceedings of the Royal Society B, the study found that while the baboons ...