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The U.N. nuclear agency says that slightly elevated levels of radioactivity detected in northern Europe likely were related to a nuclear reactor that was either operating or undergoing maintenance, but it’s still unclear where it is located

Federal officials plan to reconsider how they manage Yellowstone National Park’s wild bison herds following longstanding complaints over the thousands of animals killed by hunters or captured and slaughtered as they attempt to migrate into Montana

Some Tesla workers and labor activists say the company is threatening to fire employees who haven’t returned to the company’s California factory since it reopened because they're afraid of catching the coronavirus

California regulators have sued Cisco Systems for discriminating against an engineer at the company's headquarters because he is a Dalit Indian

Astronauts are performing their second spacewalk in under a week to replace old batteries outside the International Space Station

The U.N. nuclear agency says slightly elevated levels of radioactivity that have been detected in northern Europe pose no risk to human health or to the environment, but it’s still unclear what the cause was

A company wants to use an advanced balloon to fly customers from Earth’s surface in Alaska to the highest reaches of the planet’s atmosphere