There wasn't a single pony in the Pony Express, just horses!
57
To find out if a watermelon is ripe, knock it, and if it sounds hollow then it is ripe.
84
On some Caribbean islands, the oysters can climb trees.
58
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
On average, there's 300 billion neurons in the octopus brain.
129
Cats sleep for 70% of their lives.
8