But early in its history, the Red Planet may have had a much larger moon, which might be responsible for Mars' weird shape ...

The moon's canyons stretch out from the Schrödinger impact basin, a 200-mile-wide (320 km) crater located near the moon's south pole, which was formed when a meteor slammed into the lunar surface.

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.

The two canyons, called Vallis Schrödinger and Vallis Planck, are located on the far side of the moon, so they can only be seen from orbit—not from Earth. Each canyon is over 165 miles long and ...

Moon Grand Canyon carved out in less than 10 minutes by bullet-fast space rocks. Space rocks travelling as fast as a bullet carved out 2.6km trench in lunar surface . Anthony Cuthbertson.

Today, Mars has two tiny moons. But early in its history, the Red Planet may have had a much larger moon, which might be responsible for Mars' weird shape and extreme terrain, Michael Efroimsky ...

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.