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George Johnson talks about his new book, Miss Leavitt's Stars: The Untold Story of the Woman Who Discovered How to Measure the Universe. Henrietta Leavitt, while working at Harvard College's observatory in the early 20th century, discovered a way to measure distances between stars, which led astronomers to calculate the size of the universe.

NPR's Michel Martin speaks with Dina Temple-Raston, host of the podcast Click Here, who spoke with some of the protesters.

The interim guidance — which recommends disqualifying applicants who have been hospitalized with the disease — is still under review, according to Mark Milley, chairman of the Joint Chiefs of Staff.

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.

Voters turned out at a rate not seen in decades. Polls showed the left-wing coalition New Popular Front gaining a majority of seats in parliament with the far-right National Rally in third place.

Silicon Valley has emerged early as a presidential campaign issue among Democrats at SXSW. Calls to regulate tech put the party in an awkward position, given its reliance on tech donors.

The media company Ozy seemed like a digital success story, but a New York Times column has raised questions about whether that's a mirage created by a charismatic leader.

There are strict rules about what drug companies can say in TV or print ads. But a new study shows there's a lot more wiggle room when companies pay to sponsor online search results.

A recap of the explosive testimony before the House Jan. 6 panel. Turkey agrees to support Norway and Sweden joining NATO. As fears of a recession build, companies are laying off workers.

European weather sites posted imagery showing the swirling wind patterns and a waterspout over the Mediterranean. The low pressure system shared characteristics of tropical cyclones.