Water and oxygen not enough: Scientists reveal two ‘must-have’ ingredients for life on other planets
Milky Way (Source: NASA) For decades, the search for extraterrestrial life has revolved around a simple rule: follow the water. If a distant planet had liquid water and perhaps oxygen, it would be flagged as potentially habitable. But new research led by scientists at ETH Zurich shows that this long-term strategy may not be complete. … Read more