Earth
Earth’s tectonic plates may have sped up three times in its past
News
geology
Definition
Fossils
Earth
Seismic waves reveal giant structures deep beneath Earth’s surface
News
Environment
All five of Earth's largest mass extinctions linked to global warming
News
Last Word
Mysterious alignment: How do ancient monoliths still line up with the sun?
Regulars
Earth
Plate tectonics may have started on Earth 3.2 billion years ago
News
Space
A giant raft of rock may once have floated across Mars’s ancient ocean
News
Earth
Rock peeling off continents may have triggered biggest mass extinction
News
Space
Strange lines on Venus may be folded stacks of lava eroded by wind
News
Space
China’s rover has discovered what lies beneath the moon’s far side
News
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
News
