What if we're all from Mars? AFP/Getty Images hide caption

toggle caption AFP/Getty Images
If Life Traveled From Mars To Earth On A Rock, Who Are We?
  • Download
  • <iframe src="https://www.npr.org/player/embed/217236697/217511063" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
Space Telescope Reawakened for an Asteroid Hunt
  • Download
  • <iframe src="https://www.npr.org/player/embed/217213416/217213407" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
Far Out: Voyager 1 Might Be Over The Edge, Into Deep Space
  • Download
  • <iframe src="https://www.npr.org/player/embed/215403126/215404588" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
A Telescope Fails, but the Hunt for Exoplanets Continues
  • Download
  • <iframe src="https://www.npr.org/player/embed/214833691/214833682" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

This may look like a mad scientist's garage sale, but it's actually the most precise clock ever built. Jim Burrus/NIST hide caption

toggle caption Jim Burrus/NIST
The World's Most Precise Clock Could Prove Einstein Wrong
  • Download
  • <iframe src="https://www.npr.org/player/embed/214186448/214573858" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

This artist rendering provided by NASA shows Voyager 1 at the edge of the solar system. AP hide caption

toggle caption AP
Has Voyager 1 Left The Solar System?
  • Download
  • <iframe src="https://www.npr.org/player/embed/212704340/213402435" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Mission to Mars: Six explorers lived in this simulated Mars habitat in Hawaii for four months, part of a NASA study to test the role of cooking and food on an extended space mission. Sian Proctor/NASA HI-SEAS hide caption

toggle caption Sian Proctor/NASA HI-SEAS

An artist's illustration of Kepler-22b, a planet that circles its star in the "goldilocks" zone. Ames/JPL-Caltech/NASA/Getty Images hide caption

toggle caption Ames/JPL-Caltech/NASA/Getty Images
Kepler Space Telescope Is Beyond Repair, NASA Says
  • Download
  • <iframe src="https://www.npr.org/player/embed/212527883/212527860" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript