EarthEarth's core is two-and-a-half years younger than its crust We have long known that gravity makes the Earth's centre age more slowly than its surface – but the effect is much more pronounced than once thought 51¶¯Âþ
EarthTravel back in time to Earth's mightiest rivers and mountains The giant rivers and mountain ranges of the supercontinent Rodinia 1 billion years ago make the Amazon and the Andes seem piddling Features