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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.

This summer, Kenyan artists came to Washington, D.C., for the Smithsonian Folklife Festival. Some of them make their living by turning trash into sculptures, jewelry and igloos.

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 House Jan. 6 committee preps for a primetime hearing. Poll: A majority of Americans blame Trump for Jan. 6 insurrection. The pipeline that brings natural gas from Russia to Germany is to reopen.

The Exxon Mobil CEO had, at times, a shaky hearing before the Senate Foreign Relations Committee on Wednesday. He's still expected to win confirmation, but perhaps narrowly.

Nearly 11,000 more were injured. The toll includes four Americans who died at a Mount Everest base camp. In addition to food, the U.N. says medical supplies are desperately needed.

Arizona's largest hospital system is nearing ICU bed capacity as coronavirus cases surge. Will Humble, the state's ex-health chief, urges a new executive order requiring Arizonans to wear face masks.

Prime Minister Theresa May is taking flak from across the ideological spectrum amid a series of resignations. Some are demanding a no-confidence vote; others are demanding an entirely new referendum.

Special counsel Robert Mueller hasn't closed the door on a hearing but has said his report includes everything he would have to say. Lawmakers could play by those rules and still learn something new.

Despite calls for Joe Biden to choose a Black woman as his vice presidential pick, many progressives are urging him to choose Sen. Elizabeth Warren instead.