Marijuana use among teenagers is entering a new phase—one shaped not only by changing laws but also by shifting perceptions of risk. As legalization expands across the United States, researchers and ...

Google is testing a new use of artificial intelligence that could reshape how news is presented to millions of users — but early results are already raising concerns. The company has begun ...

A photo of a shipwreck, buried in silt for centuries and containing cargo in unbroken ceramic vessels, drew the only gasps at a recent seminar on the archaeology of the Mediterranean at the University ...