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Study says tipping point reached as poachers kill 7 percent of African elephants annually; birth rate is 5 percent
Fish and Wildlife Service is considering downgrading the species’ status, which could loosen marine regulations
The African jackass penguin has something to say
A stroke of colossal misfortune (and a giant asteroid) may have killed dinosaurs 66 million years ago
Lizards were sent into orbit as part of study into effects of weightlessness on sexual intercourse
Designated area includes 685 miles of beach and 300,000 square miles of ocean spanning six states
Meet 18-year-old Petra Grutzik, whose award-winning research with UCLA neuroscientists is just the beginning.
The National Aquarium in Baltimore is the first aquarium or zoo to publicly consider closing its dolphin exhibit
Birth is part of effort to save a species that could be extinct within a decade
A week with scientists who track pregnant sharks in the Bahamas