Serious algae outbreaks have hit more than 20 states this summer. Algae blooms aren't unusual. But the frequency, size and toxicity now are worse than ever, and changes in climate are partly to blame.

Scientists have discovered the fossils of what may be the oldest green algae ever known. The newfound seaweed — called Proterocladus antiquus — lived about a billion years ago.

The microorganisms known as blue-green algae aren’t actually algae at all. They are cyanobacteria, bacterial cells that get their energy from photosynthesis.. Toxic blooms in freshwater lakes ...

Despite its name, this algae can be blue, green, brown or red in color. “If the water appears suspicious or there is decaying algae on the shore, avoid contact and keep dogs away,” the KDHE ...

Human illnesses from toxic blue-green algae happened predominately in June, the CDC said. The most commonly reported symptoms were gastrointestinal, dermatologic, and generalized, such as ...

Two new studies of green algae — the scourge of swimming pool owners and freshwater ponds — have revealed new insights into how these organisms siphon carbon dioxide from the air for use in ...

Expansive blue-green algae blooms around the lower portions of the lake this year have raised toxin concentrations to some of the highest levels ever seen this early in the season.

Scientists have discovered the fossils of what may be the oldest green algae ever known. The newfound seaweed — called Proterocladus antiquus — lived about a billion years ago.And even though ...