4-Billion-Year-Old Crystals Offer Clues to When Plate Tectonics Began, Setting Stage for Life on Earth

LightSail 2 getting lower as it completes third year in space

Artificial photosynthesis can produce food without sunshine. Scientists are developing artificial photosynthesis to help make food production more energy-efficient here on Earth, and one day possibly on Mars.

600,000-Year-Old Artifacts Reveal The Identity of Some of Britain's Oldest Toolmakers