Tigers can see 6 times better at night than humans.
305
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
Babies crawl an average of 200m a day.
212
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
It takes approximately 12 hours for food to entirely digest.
93
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13