Although the Earth’s been decidedly blue for 600 million years, rising populations of phytoplankton caused by rising temperatures are once again causing the world’s oceans to turn green.

Firefly Aerospace’s Blue Ghost spacecraft has captured some stunning footage from 75 miles (120 kilometers) above the lunar ...

Earth's oceans may have been green for billions of years until the first photosynthetic organisms flooded our atmosphere with ...

Stocks: Real-time U.S. stock quotes reflect trades reported through Nasdaq only; comprehensive quotes and volume reflect trading in all markets and are delayed at least 15 minutes. International ...