1. The image projected onto the back of our eyes is upside down. Our brain decodes this image so that we perceive it the right way up. 2. Experiments by MIT scientists show that the human brain can ...

Optical illusion photos challenge the human eye by hiding images in plain sight to test concentration and attention span. In ...

The human eye. videoThe human eye This short film offers ... videoThe human heart This short film uses 3D CGI images to show the movement of blood through the chambers of the heart and also ...

Human eyes can’t decipher individual pixels from far away—this video shows why. A version of this story appears in the October 2018 issue of National Geographic magazine. Short for “picture ...