Using frozen blood samples, researchers tracked where and when the HIV/AIDS crisis became an American epidemic.
A new report shows global populations of wild mammals, fish, birds, amphibians and reptiles fell 58 percent on average between 1970 and 2012.
Nets and other fishing gear are so dangerous to dolphins that the Irrawaddy dolphin is functionally extinct.
Hundreds of people claim hookworms helped them overcome asthma or other inflammatory diseases. Soon, they may not even need the parasites.
An technical error is believed to have caused the lander's parachute to separate about a minute too early.
Gravitational quirks can cause star-forming clouds to condense into pairs and groups of stars.
The treatment, commonly known as Miracle Mineral Solution, Master Mineral Solution or MMS, can cause serious health problems if ingested.
The muscles that stabilize the back shrink from disuse after months in space.
Price hikes and fleeing insurers overshadow this year's Obamacare enrollment.
The American Academy of Pediatrics released new sleep guidelines for infants.
A mom held her previously conjoined twins for the first time.
Scientists found tiny changes in the white matter of young boys who played just one season of football.