Scientists may have discovered a lost continent
We might have to rethink our models of ancient Earth.
Some of Earth's oxygen escapes to the moon every month
And it's been going on for more than 2 billion years.
From Mars to Earth and the Moon, 127 million miles away
A new photo from the Mars Reconnaissance Orbiter should make just about everybody feel like an insignificant speck of dust.
The Earth's core has a 'jet stream' of molten iron
European scientists discovered the fast-flowing stream thanks to a trio of satellites.
After Math: Game over
Life should come with a reset button.
NASA mission will study Earth's 'breathing' from space
A satellite will monitor plant life to see how it influences the planet's carbon cycle.
Google timelapses offer a 32-year look at Earth's history
Google Earth Timelapse highlights both ever-changing nature and urban sprawl.
Stephen Hawking warns humans may have only 1,000 years left on Earth
You've heard this one before.
The moon's birth may have temporarily vaporized the Earth
But it's too early to say how true that is.