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Regal fritillary butterflies have largely disappeared from the East Coast, save for a military base in central Pennsylvania. A few days each summer, hundreds descend for guided tours to see them.

In Florida, students at a liberal arts college "rebuilt" a Berlin Wall replica to study the history of societal divisions and how they persist today — 30 years after the wall was taken down.

When he was running for president, Trump said NATO was "obsolete." But now, with the French president accusing the alliance of experiencing "brain death," Trump is pushing back.

The rule extends a 2017 law pertaining to outlets like Voice of America. That law was drafted after the Justice Department compelled Russia-backed RT America to register as a foreign agent in the U.S.

What's old is new. From ingredients to techniques, chefs are playing with that most traditional of comfort foods: lasagna. We dig in to what's between the layers from nonna to nouveau.

Meteorologists in Southern California were puzzled by the big green blob on their radar — it looked like a rainstorm on what was a clear day. Then they discovered it was beetles.

Seventeen automakers signed a letter to the Trump administration and California Gov. Gavin Newsom saying they want one set of policies to reduce greenhouse gases and make cars more fuel efficient.

Moulton is the fourth House Democrat to join the 2020 campaign. A critic of party leadership, the Marine Corps veteran also adds to the share of 40-and-under candidates in the race.

John Kempf is a longtime farmer in Ohio. He grew up on a conventional fruit and vegetable farm. His dad was a pesticide distributor and he became a…

Saving endangered species usually brings to mind tigers or whales. But scientists say parasites need protection, too. They play an important role in the ecosystem, and many are at risk of extinction.