What is planet Earth like?
Our Blue Marble
What is planet Earth like?
Imagine a giant blue marble, spinning quietly in the dark, packed with oceans and mountains and weather and whales. That's home. That's Earth — the only place we've ever found where life decided to throw a party and never leave.
Earth is mostly water — so much that if aliens named us, they'd probably call us "Planet Ocean." Blue covers about seven-tenths of the surface. The land we walk on is really just the dry tops of enormous mountains poking up out of a world-wide sea.
