Donald Cline must have thought no one would ever know. Then DNA testing came along.
When a New York woman gave birth to twins after IVF, neither baby was related to her, or to each other.
The tiny population of wolves on Isle Royale descended from a much larger group. What if that helped doom them?
The average hospitalized patient endures 350 alarms each day.
A fecal-transplant patient has unexpectedly died just as the FDA is deciding the future of the unconventional procedure.
Can doctors teach people how to parent?
After becoming a sperm donor, Tim Gullicksen wanted to get to know his donor kids. Now he invites them all out to a lake in California every summer.
It’s been genetically unchanged for at least 900 years.
The highest levels of microplastics are found more than 650 feet below the surface.
He Jiankui chose a famous mutation to edit into human embryos. Scientists are still trying to figure out everything it does.
How did they all die at once?
Naturopaths have long been obsessed with a gene called MTHFR. Now vaccine skeptics are testing for it too.
“Literally tens of thousands of people were employed to just spoon poison into the burrows.”
A suitor on The Bachelorette says he is a sperm donor with 114 kids—is that too many?
In the ’70s and ’80s, Donald Cline fathered more than 50 children by using his own sperm in his patients. A new law makes such actions illegal.
How an obsolete medical device with a security flaw became a must-have for some patients with type 1 diabetes
The history of animal domestication might be recorded in ancient pee.
Microglia make up 10 percent of the brain, and an extremely rare case shows just how important they are.
Decades after a deadly outbreak, a researcher found a key clue to its cause inside frozen microbes.
Three tiny, newly described viruses—named Larry, Curly, and Moe—target bigger viruses.
FamilyTreeDNA was criticized for secretly working with the FBI. Now it’s explicitly asking potential customers to help law enforcement.