Answering a deceptively simple question: What Is One Degree?
It may seem like a simple question, but the reality is anything but clear-cut.
Planet Earth has some incredible imagery - but do you know what's going on in these pics?
The Operation Iceberg team follow the epic journey of an iceberg out at sea.
Deserts are the most haunting of all the Earth's landscapes.
How much do you know about the landmasses that make up our planet?
The seven continents of the world are made up of four continuous landmasses.
Will Madagascar's bizarre wildlife bamboozle you?
We went to the ends of the earth for this to test your Arctic and Antarctic knowledge.
Don't let a deluge of questions put a dampener on this rainforest quiz!