After the roughly 7.5-mile-wide (12 kilometers) asteroid struck off the coast of the Yucatán Peninsula in the Gulf of Mexico, ...

An international team of researchers has systematically measured the β-decay half-lives of 40 nuclei near calcium-54, ...

The principal aim of life history theory, a branch of evolutionary ecology, is to explain the remarkable diversity in life histories among species. But there is another, more compelling reason for why ...

New theory proposes that humans — and analogous life beyond Earth — may represent the probable outcome of biological and planetary evolution UNIVERSITY PARK, Pa. — Humanity may not be extraordinary ...

A single thermal performance curve applies across life, from bacteria to animals. Species differ in optimal temperatures, but ...

Analyzing fossils can be difficult -- especially when they're so small that they can only be seen with a microscope. Researchers have now come up with a solution. Fossils don't always come in large, ...

The earliest cells likely didn’t have membranes to separate and protect their components and chemistry away from a harsh surrounding environment. But they may have made do with rain. When you purchase ...

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 ...

Scientists may have a step forward in understanding how life on our planet came to exist. The mystery of how tiny molecules of RNA came to be enclosed within membranes, forming the very first cells, ...