Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Each king in a deck of playing cards represents a great king from history: spades - King David, clubs - Alexander the Great, hearts - Charlemagne, and diamonds - Julius Caesar.
33
Penguins have a gland above their eye that turns saltwater into freshwater.
12
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19