Planets with water are the main targets for scientists' search for life on other worlds. Find out how a new study shows that these planets can be very different from Earth.
Healthy sleep always makes us feel better the next day. Find out how a recent discovery may lead to more effective treatments for mood disorders, PTSD and other mental illnesses.
Ecologists have always thought that tropical diversity came from increased species interaction. Find out why they may have been wrong all along. (4:30 min read)