Scientists say they have figured out how to transform rocks into something extraordinary: a high-tech, low-cost substance ...

Ancient DNA is telling us more and more about humans and environments long past. Could it also help rescue the future?

Although the Earth’s been decidedly blue for 600 million years, rising populations of phytoplankton caused by rising ...

Earth's oceans may have been green for billions of years until the first photosynthetic organisms flooded our atmosphere with ...