Years of worsening water quality from toxic runoff have increased algae blooms and killed the sea grass that manatees graze on, experts say.
A drought crisis has erupted in the Klamath Basin along the California-Oregon border, with fish dying en masse and farmers infuriated that they have been cut off from their main water source.
While on a college field trip to collect beetles, he found salamanders. He became an authority and later grew alarmed by the disappearance of many amphibians.
Deaths at a Sierra Leone sanctuary that stumped people for 15 years have now been linked to a bacterium that seems to cause similar ailments in humans.
Is dining on nature’s predators an act of environmentalism — or just a new way for humans to bend the world to our will?
Some conservationists accepted the explanation provided by Botswana’s government, but others raised doubts.
Scientists say that the wildfires in the West combined with drought and record heat waves could be triggering one of the Southwest’s largest migratory bird die-offs in recent decades.