To find out if a watermelon is ripe, knock it, and if it sounds hollow then it is ripe.
84
A female ferret will die if it goes into heat and cannot find a mate.
143
Goldfish remember better in cold water than warm water.
29
Dalmatians are born without spots.
101
Dogs have been man's pet for over 14,000 years.
224
15% of snails survive digestion by birds and are found alive in their droppings, potentially leading to the spread of snail populations.
1
A crocodile cannot stick out its tongue.
1k
The cicada, a fly found in Africa, spends 17 years of its life sleeping; and only two weeks is awake during which mates and then dies.
33