As NASA plans for long-term human missions beyond Earth, one question keeps resurfacing: how do you sustain life in places ...

At the microscopic edge of biology, researchers have uncovered an organism so stripped down that it forces a rethink of what ...

Because they rely on hosts for a majority of functions, viruses aren’t considered alive. But entities like this one complicate matters.

Russian scientists successfully revived 24,000-year-old micro-organisms, bdelloid rotifers, from Siberian permafrost, ...