The video explores the mystery of the grooves on Mars' moon Phobos. Discovered in 1877, Phobos and its twin Deimos were first closely observed by NASA's Mariner 9 in 1971. Unlike Earth's moon, Phobos is small and irregularly shaped, with grooves that suggest past traumatic events. Initial theories linked these grooves to an impact event, but further investigation revealed they might be caused by bouncing boulders or tidal forces from Mars. The latter theory suggests Phobos is being pulled apart by Mars' gravity, and in 30 to 50 million years, it may be torn apart completely.

What makes Phobos unique compared to Earth's moon?

• It has a similar surface composition.

• It is larger than Earth's moon.

• It has a perfectly circular orbit.

• It is much closer to its planet.

What was the initial hypothesis about the origin of the grooves on Phobos?

• They were caused by a large impact event.

• They were the result of human activity.

• They were formed by volcanic activity.

• They were created by water erosion.

What is one challenge to the impact hypothesis for the grooves on Phobos?

• The grooves do not originate from the crater.

• The grooves are too shallow.

• The grooves are filled with water.

• The grooves are not visible from space.

What alternative explanation is suggested for the grooves on Phobos?

• They are the result of volcanic eruptions.

• They are remnants of ancient rivers.

• They are marks left by ancient civilizations.

• They are caused by tidal forces from Mars.

What is the potential future of Phobos due to tidal forces?

• It will collide with Mars.

• It will be ejected from Mars' orbit.

• It will become a new planet.

• It will disintegrate over time.