Planet Earth has some incredible imagery - but do you know what's going on in these pics?
Nature's Great Events charted the effects of global climatic phenomena.
Arachnophile or arachnophobe? Maybe fear will drive you to do well in our fiendish quiz!
Will Madagascar's bizarre wildlife bamboozle you?
Are you a quizzy king of the jungle or a savannah know-nothing?
Test your knowledge of David Attenbourough
Don't let a deluge of questions put a dampener on this rainforest quiz!
Not a fan of salt? Take a dip in our freshwater life quiz.
Somehow they've been labelled as horrible slimy-skinned critters.
Isolation from the rest of the world means Australia has some of the weirdest animals.
These aquatic animals have ruled the water for hundreds of millions of years.
How well do you know the father of the theory of evolution by natural selection?