The fictional biologist in ‘Project Hail Mary’ claims that potential alien organisms might not be made of carbon or require ...

Scientists hunting for life beyond Earth have long thought that water is one of the key indicators. But a group of experts now says that looking for life on water–rich planets could be a waste of time ...

Every known living thing on Earth needs water. The life-giving liquid makes up around 60 percent of each human’s body weight, regulating temperature, transporting nutrients to cells and protecting ...