A subset of AI called reinforcement learning is helping scientists improve nuclear fuel technology, which they could use to power spacecraft and rockets.

Researchers studied fossils, well-preserved remains and even a single fingerprint to solve some of history’s long-standing mysteries this year.

Young Glinda may shine in "Wicked: For Good," but at home she’s still just 8-year-old Scarlett. Her mom shares their story —and what Ariana Grande said on set.