Biologists are confronting a problem they thought they had mostly solved: what, exactly, counts as life. A wave of ...

It is unclear whether a [3I/ATLAS] would transmit radio signals … such signals would take tens of thousands of years to cross ...

A giant impact on the early Earth could have brought the building blocks of RNA to our planet, which new research suggests ...

Machine learning is quietly rewriting the rules of the cosmic hunt for company. Instead of waiting to recognize familiar ...