While climate change warms Earth's waters, it also creates another problem: a big loss of oxygen in water.
In 1997, NASA began launching satellites that could constantly record life on our planet. It's now released a video of how Earth grew in real time.
The Centers for Disease Control and Prevention said recent confirmed cases of algal toxins in municipal drinking water made people sick.
Researchers are testing what urine and other molecules can be turned into to help astronauts on a mission to Mars.
The Gulf of Mexico's "dead zone" measured in at more than 8,700 square miles — an area roughly the size of New Jersey.
A toxic algae that ravages animals' brains has been killing sea lions in California.
Crews continue to clean up green algae that has spread across Denver City Park's Ferril Lake.