Tigers can see 6 times better at night than humans.
305
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
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
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
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