Planet Earth is this solid thing you are standing on right now. In your everyday life you don't really waste a thought about how amazing this is. A giant, ancient, hot rock. How did it come...

Something important you'll notice: as more outside groups get involved in the war, each escalates by backing their side, then a rival will also get involved to back the other side. So what you have...

BBC Knowledge commissioned Territory Studio (territorystudio.com) to produce an animated film on the subject of DNA. Three minutes is a short time to explore a subject where most doctorates only...