Three crew members arrived at the International Space Station, Wednesday evening. They join three others to bring the station's crew back to full-strength. During their time in space, one of the group's tasks will be to showcase the Olympic torch.
An important element, oxygen, may have been present in high levels relatively early in the planet's history, according to new findings. This suggests photosynthetic organisms were on Earth 3 billion years ago.
Astronomers at the University of Minnesota reported this week that contributors to the citizen science portal, Galaxy Zoo, had helped them to amass a database of galaxies some 10 times larger than any previous galaxies catalog.
Global warming weakens a key ingredient for tornado-making thunderstorms, prior studies held. True, researchers now say, but the number of days in the US where the right conditions exist will increase.
New research suggests that soldiers treat their robots much like they do their fellow soldiers. The research raises new questions about how to ensure than robots are used safely and ethically in combat.