The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
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
Our eyes are always the same size from birth, but our nose and ears never stop growing.
266
You forget 90% of your dreams.
256
Enamel is hardest substance in the human body.
61
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
All 13 minerals necessary for human life can be found in alcohol beverages.
282
Our brains have a negativity bias and will remember bad memories more than good ones.
15