A mature birch tree can produce up to 1 million seeds per year.
The word "Arctic" comes from the ancient Greek Arktikos, or "country of the great bear." Though the Greeks had no knowledge of the polar bear, they named the region after the constellation Ursus Major, the Great Bear, found in the Northern Sky.
The total water supply of the world is 326 million cubic miles (1 cubic mile of water equals more than 1 trillion gallons).
Female mosquitos will obtain blood from humans and animals, but only to nourish their eggs. Their food actually consists of nectar and other plant juices.
Trees improve water quality by slowing and filtering rain water, as well as protecting aquifers and watersheds.
Male bees will try to attract sex partners with orchid fragrance.
The largest insect in the world, the meganeuron, a prehistoric dragonfly, measured 29 inches from wingtip to wingtip.
A wolf can run at a speed of 65 kilometres per hour during a chase. Wolves have long legs and spend most of their time trotting at a speed of 12-16 kilometres per hour. They can keep up a reasonable pace for hours and have been known to cover distances of 90 kilometres in one night.
Penguins "fly" underwater at up to 55 miles per hour
Rainforests can be found all over the world from as far north as Alaska and Canada to Latin America, Asia and Africa.