Rats multiply so quickly that in 18 months, two rats could have over a million descendants.
33
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
In Australia, there are spiders big enough to eat snakes.
20
The average city dog lives three years longer than the average country dog.
38
An ant brain has about 250 000 brain cells. A human brain has 10,000 million so a colony of 40,000 ants has collectively the same size brain as a human.
118
A female ferret will die if it goes into heat and cannot find a mate.
143
Goldfish lose their color if they are kept in dim light or are placed in a body of running water, such as a stream.
12