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NPR's Mary Louise Kelly speaks with Tim Podlogar, who researches exercise metabolism, about how elite cyclists consume thousands of calories each day to compete in the Tour de France.

NASA has announced it is moving forward with several plans to return rock samples from Mars.

Senate Majority Leader John Thune is a key ally of President Trump's, helping get his domestic policy bill passed by the Senate. It is a dramatic reversal from their days as virtual political enemies.

In a key California Central Valley House race, both the Democratic and Republican candidates have bucked their parties' national platforms to try to win in this purple district.

Researchers have discovered a Mayan site hidden deep in the jungle on the Yucatan Peninsula thought to have been built over a thousand years ago.

The gun control debate continued to dominate the news this week with President Obama coming out strongly in support of reforming the current gun control laws alongside the Newtown families. Host Jacki Lyden speaks with James Fallows, national correspondent with The Atlantic, about that story along with the bird flu in China, North Korea and the Postal Service.

The Dodgers are the first repeat World Series champions since 2000 when the New York Yankees won three in a row. Already, people in Los Angeles are looking ahead to next season to equal the feat.

Ukraine is under increasing pressure to agree to a peace deal American and Russian negotiators developed.

The remote region of Ridgecrest, Calif., was hit by back-to-back earthquakes, the state's biggest in 20 years. The many powerful aftershocks have residents worried about what comes next.

Memorial ceremonies are taking place in Israel for the Oct. 7 Hamas attacks. We hear from Israeli and Palestinian voices as they reflect on an agonizing 12 months of war.