Earth's magnetic field, which protects the planet from harmful blasts of solar radiation, is much older than thought.
July will arrive a little late this year -- one second late, to be exact -- and we have the moon to blame.
The second known natural quasicrystal was found inside a meteorite that crashed to Earth in Russia.
A company is planning to offer weather forecasts via a system of small satellites that will watch as GPS spacecraft pass through Earth's orbital horizon.
Nitrogen may have arrived on Earth in ancient meteorites after the planet had already formed.
This week: See some of our favorite recent shots of Planet Earth from space.
The European Space Agency's GOCE satellite no longer exists, but its data is helping map the world's oceans Continue reading →
Strange spikes in Siberia seen from space have an Earthly explanation.
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