Biologists are quietly rewriting what it means to be alive, and the human body has become one of their strangest frontiers. Inside our cells and microbiomes, researchers are uncovering entities that ...

Scientists have debated the definition of life for decades, but they still lack a consensus on the answer. Experts believe that "edge cases" make life difficult to define and blur boundaries across ...

To successfully look for life beyond our own solar system, astrobiologists desperately need a viable definition of life. Even after a century or so of debate, they lack a viable universal definition ...

Asking a biologist to define 'life' is a bit like looking-up the word 'definition' in a dictionary — it's as if you're questioning their very existence. Biologists like myself don't agree on what life ...