Hummingbirds have such a high metabolism that they are always hours away from starving to death.
Palm trees are not technically trees, they're grass.
Oak trees do not produce acorns until they are at least 50 years old.
According to research by John Innes Centre team reports in e-Life journal, plants have a built-in capacity to do maths, which helps them regulate food reserves at night.
A duck's quack doesn't echo, and no one knows why.
A cockroach can live several weeks with its head cut off. it dies from starvation.
Giraffes only sleep for about 5 minutes at a time.
Wasps emit an "alarm pheromone" when you kill them, summoning the rest of their colony.
A giraffe and a rat can last longer than a camel without water.
An elephant weighs less than a blue whale's tongue.