Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Cows can sleep standing up, but they can only dream lying down.
745
The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
14
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
The largest breed of rabbit is the Flemish Giant.
65
Your thumb is about the same size as your nose.
124