Houchin and his colleagues studied dozens of zircon crystals from the Jack Hills in Western Australia. These are the oldest ...

There are many open questions about how our planet formed 4.55 billion years ago: When did plate tectonics start? When did the Earth's mantle begin to vigorously circulate in a process called ...

After a long, cold winter, the vernal equinox heralds the arrival of spring in the Northern Hemisphere. But have you heard the myth about balancing an egg on its end?

UC College of Arts and Sciences Professor Thomas Algeo has been studying the planet's five major mass extinctions since the ...

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The “gravity hole” formed at least 70 million years ago after convection in Earth’s mantle. The weak gravity could impact our oceans.

A sediment-washing “bubbler” helped researchers recover 65.5-million-year-old teeth that illuminate how early primate ...

A team of scientists says it's possible to use tiny ripples in space and time, or gravitational waves, to measure the rate at ...

Saturn’s largest moon, Titan, may have been born in a colossal cosmic crash. New research suggests Titan formed when two older moons slammed together hundreds of millions of years ago—an event so ...

A terrazzo star map at Hoover Dam turns a sunny overlook into a 26,000-year clock marking human ambition against moving stars now.

Petroglyphs on sandstone at a national park in Chad bear witness to wildlife that once roamed the area before the continent’s ...

Ocean waves are a vast and steady source of renewable energy, but capturing their power efficiently has long frustrated ...