Mars had an oxygen-rich atmosphere around 4 billion years ago
13
You forget 90% of your dreams.
256
Your body is creating and killing about 2.4 million red blood cells per second.
17
The largest breed of rabbit is the Flemish Giant.
65
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Your thumb is about the same size as your nose.
124