Stepping into Earth as it existed 200 million years ago would feel less like time travel and more like arriving on an ...

For decades, many scientists have relied on the "hard steps" model to suggest that intelligent life is rare — the improbable result of a series of unlikely evolutionary leaps. But new research by ...

As the sun expands over the coming billions of years, Earth will become inhospitable to any life more complex than a microbe ...

Researchers propose that tiny mineral nanoparticles may have been the hidden engines that transformed Earth’s early chemistry ...

The Cambrian Explosion in which life on Earth underwent massive diversification was likely triggered by eccentricities in Earth’s orbit around our Sun. Or so say the authors of a new paper just ...

Earth’s earliest animals may have held evolution back because they reproduced asexually, creating low-competition communities ...

Scientists suggest Earth's earliest animals reproduced asexually, slowing evolution and delaying the biodiversity boom that ...

UC College of Arts and Sciences Professor Thomas Algeo has been studying the planet's five major mass extinctions since the Ordovician Period, when global sea levels were much higher than today. In a ...

Could we live on Venus?

In his 1989 book Wonderful Life, the late Harvard scientist Stephen Jay Gould imagined rewinding life’s history to an early ...