Machu Picchu is one of the world's most breathtaking sites. But it's in danger of ruin, as a new airport would bring in loads more tourists.

With a lack of ancient human bone excavations in Scandinavia, finding human DNA within this piece of chewed-up birch bark was a huge victory.

In the past, breeders have focused squarely on size and shelf-life of their produce. With this new tool, scientists hope breeders will opt for taste and pathogen resistance as well.

While many of us are grateful for the 40-hour work week, Medieval peasants worked far less than even that.

A hotel employee found three guests killed with crossbow bolts to the head and chest — but the case got much, much weirder.

"There was an almost complete turn over in the fauna. Everything…went extinct. Yet as the Aldabra rail still lives on today, something must have happened for it to have returned."

The rest of the world has ethical and scientific concerns, though West Virginia is set to begin similar clinical trials in June.

The DNA testing company found Darrell Crawford's results so unprecedented that they said it was like finding Bigfoot.

More than 30 million Americans have from diabetes. Many of them have to put their kids' college funds or savings aside, just to afford the life-saving drugs they need to survive.

"I just felt like I wanted to be able to fight for people who have paid their dues to society. I just felt like the system could be so different, and I wanted to fight to fix it, and if I knew more, I could do more."

John Kapoor's conviction sets an enormous precedent: He's the first pharmaceutical boss to be convicted for his role in the U.S. opioid epidemic.