Methane on Mars | NASA Planetary Sciences

Explore whether Mars is alive -- geologically or biologically -- in this video from NASA. Satellite images and the recent discovery of water ice on the surface of Mars suggest liquid water is flowing beneath the surface, which could make it a habitable planet. The controversial discovery of methane plumes, which could be produced from a geological or biological source, could help scientists determine whether life is present. The video looks at the scientific research being conducted to test hypotheses, explores the similarities between Mars and Earth, and introduces how future missions to Mars could help scientists learn more. CREDITS: LICENSE:

LicenseCustom License

More videos by this producer

ScienceCasts: Escape of the Destructive Electrons

Visit for more. Earth is surrounded by electrons that can be disruptive to our technology. NASA is using high-altitude balloons and spacecraft to monitor and understand these particles in the radiation belts surrounding our planet. Click here to see more videos: https://al

NASA ScienceCasts: A Sunset Sky Show

Click here to see more videos: Visit for more. On the evening of March 18 (2018), step outside for a view of the crescent Moon, Venus, and Mercury together above the twilight horizon.

Measuring Distance in the Solar System | NASA Planetary Sciences

Explore how astronomers and scientists use astronomical units to measure distances in the solar system in this video adapted from NASA. The astronomical unit (au) -- equal to the average distance from Earth to the Sun -- is a convenient unit of measure when talking about distances in the solar syste