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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.

Democratic lawmakers are pressing the e-commerce giant about what it's doing to stop its systems from recommending books and other products with falsehoods about the pandemic and vaccines.

The acting director of national intelligence is meeting the House and Senate intelligence committees on Thursday as Washington roils over Ukraine and an ongoing impeachment inquiry.

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.

Senate Minority Leader Chuck Schumer negotiated late into the night with Treasury Secretary Steven Mnuchin and spoke hopefully of a deal coming together on Tuesday.

India's fatality statistics might be artificially low because only a small portion of all deaths that occur in India — reportedly around 22%, as of last year — are medically certified.

The series is narrated by former President Barack Obama, who just won an Emmy for outstanding narration.

Alabama extended its health orders in response to the jump in coronavirus infections. But State Health Officer Dr. Scott Harris says officials have had trouble enforcing the orders already in place.

The National Climate Assessment is the most influential source of information about climate change in the United States.