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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.

Philadelphia filed suit against Polymer80 and JSD Supply in July, accusing them of perpetuating gun violence in the city by manufacturing and selling "ghost guns."

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.

The shooting happened just three blocks from BASE, a local cheerleading gym.

Student debt cancellation is a prominent issue among young voters, but it's not the sole driving issue organizers are pushing before Election Day.

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

Top Texas law enforcement official castigates Uvalde police response to school shooting

News Wrap: New COVID-19 cases top 9.5 million globally with a majority caused by omicron