When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Enamel is hardest substance in the human body.
61
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Stress can result in more headaches as a result of the body rerouting blood flow to other parts of the body.
92
If the human eye was a digital camera, it would have 576 megapixels.
25
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
Your fingernails grow faster in summer.
744
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15