It's taken 100 years to progress from the first manned air flight to the imminent prospect of space tourism. How did such extraordinary technological advances come about? And is private space travel vital for the future of our species?
Volcanoes have long helped shape the Earth. But what is less well known is that there are volcanoes on other planets and moons that are even more extraordinary than those on our own home planet.
Our exploration of the universe is revealing alien worlds with weather stranger than anyone could ever have imagined - we've discovered gigantic storm systems that can encircle entire planets, supersonic winds, extreme temperatures and bizarre forms of rain.
For centuries we've looked up at the night sky and wondered - are we alone? We've sent messages out into the depths of space, but we've never heard anything back. Until now.
From the smallest creature under the microscope to the limitless expanses of space, BBC Earth brings viewers face-to-face with heart-pounding action, mind-blowing ideas and the wonder of being human.