The Earth Has Oceans And Continents: How Weird Is That? : 13.7: Cosmos And Culture We have both continents and oceans on Earth — but it didn't have to be this way.

Wikus De Wet/AFP via Getty Images When and how Earth's earliest continents, the cratons, first rose above the oceans remains uncertain. Previous research suggested this emergence began roughly 2.5 ...

KS1/KS2 Primary Geography. The world. A short film for primary pupils identifying the seven continents, five oceans, the Equator and Northern and Southern Hemispheres. BBC Teach.

The continents may have first risen high above the oceans of the world about 3 billion years ago, researchers say. That's about a billion years earlier than geoscientists had suspected for the ...