Earth
Plate tectonics may have begun a billion years earlier than thought
Plate tectonics may have begun 4 billion years ago, almost a billion years earlier than we thought, according to a new analysis of ancient rocks
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Earth
Earth鈥檚 tectonic plates may have sped up three times in its past
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Space
Ancient valleys on Mars may have been carved by glaciers
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Humans
We鈥檝e finally figured out where Stonehenge鈥檚 giant boulders came from
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Fossils
Earth
Seismic waves reveal giant structures deep beneath Earth鈥檚 surface
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Environment
All five of Earth’s largest mass extinctions linked to global warming
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Earth
Plate tectonics may have started on Earth 3.2 billion years ago
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Space
A giant raft of rock may once have floated across Mars鈥檚 ancient ocean
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Earth
Rock peeling off continents may have triggered biggest mass extinction
The Permian extinction, which wiped out almost all complex life, may have been caused by the undersides of continents slipping off into Earth鈥檚 interior
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Space
Strange lines on Venus may be folded stacks of lava eroded by wind
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Space
China鈥檚 rover has discovered what lies beneath the moon鈥檚 far side
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Life
See the exquisite inner world of the gemstone crazy lace agate
Regulars
Space
Huge Earth-like worlds could host reservoirs of water deep underground
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