The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Only about 2% of the world population has green eyes.
36
Your body is creating and killing about 2.4 million red blood cells per second.
17