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.
The North Pole is moving. Not the geographic axis around which Earth spins, of course, but rather its magnetic pole, the north end of which is slowly but steadily wandering across the Arctic Ocean toward Siberia. Continue reading →
Through the analysis of a previously unexplained ratio of isotopes, scientists have recovered a geological time capsule of sorts that they believe represents a very different Earth that existed some 4.5 billion years ago. Continue reading →
Intense heat during meteor impacts forged tiny bits of glass that trapped fragments of ancient plant life in Argentina. Could the same process have entombed signs of life on Mars? Continue reading →
In a new image taken from orbit, the Grand Canyon is visible slicing through the Kaibab Plateau.
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