Pond scum explains evolution of first animals

Microbial mats that existed on sea floors prior to the Cambrian explosion provided the foundation for early animal life to arise, new research looking at trace fossils of that early life has found.

A new Goldilocks for habitable planets

The search for habitable, alien worlds needs to make room for a second "Goldilocks," according to a Yale University researcher.

Nitrogen may be a sign of habitability

We might commonly think of Earth as having an oxygen-dominated atmosphere, but in reality the molecule makes up only a fifth of our air. Most of what surrounds us is nitrogen, at 78 percent. Astrobiologists are beginning ...

'Bathtub rings' suggest Titan's dynamic seas

Saturn's moon, Titan, is the only object in the Solar System other than Earth known to have liquid on its surface. While most of the lakes are found around the poles, the dry regions near the equator contain signs of evaporated ...

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