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It's a mystery how butterflies manage to make their brilliant wing colors, but Yale physicists got a glimpse when they took the question to the lab, breeding dull brown butterflies into purple ones.

The Department of Justice hired a former Jan. 6 defendant who was caught on tape urging rioters to "kill" police. The department calls him a "valued member" of the administration.

Dozens of migrants are found dead in a truck in Texas. The House Jan. 6 panel schedules a last-minute hearing. NATO leaders meet in Madrid for what could be the most transformative summit in decades.

How do I stay safe now that the public health emergency is over? We answer questions on boosters, risks when flying — and the new JN.1 variant.

Dr. Demetre Daskalakis is steering the U.S. monkeypox response. A month into the job, he sees signs of success, but there's still more to be done.

Critic David Bianculli acknowledges that his year-end list of TV favorites is hardly all-inclusive. Nevertheless, here's what he enjoyed watching, including Beckham, The Bear and Black Mirror.

Relations between the two countries have collapsed over the Ukraine war, with the U.S. slapping thousands of sanctions on Russia, and militarily, economically and diplomatically supporting Ukraine.

News Wrap: Top UN court orders Israel to end military operations in Rafah

Top Saudi diplomat discusses U.S. relations, human rights, oil production, Iran and Israel

U.S. restrictions on movement likely to persist as death toll tops China's