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Since touching down in Jezero Crater, NASA's Perseverance rover has already cached 6 samples that could one day be brought back to Earth. Astrobiologists hope they hold signs of past microbial life.

Mass. Rep. Seth Moulton of the 6th Congressional District is in the race to unseat two-term incumbent Sen. Ed Markey in this year’s Democratic primary.

Sure, the economy added 236,000 jobs last month and unemployment dropped to 7.7 percent. But questions about low wages, consumer debt and government austerity cloud the sunny picture. We look at five points economists are debating.

Atmospheric scientist Ira Leifer installed special air sensors on a camper, then drove from Florida to California, measuring methane levels all along the way. More than 6,000 readings later, he found some noticeable spikes, especially around petrochemical plants and urban areas like Los Angeles.

In a case before the Supreme Court Monday, an Arizona town maintains that Good News Community Church's signs are temporary directional signs for events, and thus limited to 6 square feet.

The lower premiums that come with bronze plans, plus Obamacare's caps on out-of-pocket spending, can make these plans the best deal for people who have very few medical expenses — or very many.

NBA:In the NBA, Cleveland beat Boston 124-118, Memphis bested Oklahoma City 114-80, Phoenix defeated Toronto 99-91, Utah topped Philadelphia 100-83,…

The U.S. was a reluctant entrant into World War I. But when America joined the battle 100 years ago, on April 6, 1917, it transformed a small military in a major international force almost overnight.

The Centers for Disease Control and Prevention last week said that the coronavirus spreads "most commonly" through air — then took it back. Is this something I should be worried about?

With all the talk about domestic terrorism, you might assume there's a law against it. There's not. The storming of the Capitol has again raised the question about whether one is needed.