Please don't call the cops on mating manatees, Florida sheriff's office says

Fire whirls and pyrocumulus clouds: How fire creates its own weather

Lost for centuries, Emperor Nero's theater is unearthed in Rome

Russia proposes joint research module on space station for China, India, Brazil and South Africa

Who was the real J. Robert Oppenheimer?

China reveals how it plans to put astronauts on the moon by 2030

The huge blob of seaweed headed for Florida has shrunk by 75%

Controversial Chinese scientist He Jiankui proposes new gene editing research

Archaeologists find a 3,000-year-old sword so well preserved it's still gleaming

How a heat dome can push temperatures to dangerous highs

Why the heat index matters more than the temperature in a heat wave

Hundreds of dolphins and sea lions have washed up dead or sick in California amid toxic algae outbreak