Illustration of Perseverance in Jezero Crater

Solar System

Water-Ice Clouds Could Have Warmed Early Mars

New simulations show that the greenhouse effect of high water-ice clouds could have warmed early Mars, permitting the presence of long-ago lakes.

Near-Earth asteroid passing Earth

Solar System

Karma Asteroid Family Might Be Sending Members Near Earth

New simulations have identified the Karma family of asteroids in the main belt as a potential source of near-Earth asteroids.

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