Scientists pushed photons across the universe to test the speed of light—and found Einstein’s cosmic speed limit still holds ...

Minneapolis — The Department of Justice said Sunday it is investigating a group of protesters in Minnesota who disrupted services at a church where a local official with U.S. Immigration and Customs ...

Indicator species are living organisms that tell us that something has changed or is going to change in their environment. They can be easily observed, and studying them is considered a cost-effective ...