Ancient Mars may have been covered in ice: study

A new study suggests that Mars' ancient valleys were formed by glaciers rather than rivers, indicating a colder and icier past. Researchers compared these valleys to those on Devon Island, a terrestrial analog. The study proposes that glaciers created meltwater channels on Mars 3.8 billion years ago, potentially offering conditions favorable for ancient life by deflecting solar radiation.

What does the new study in Nature Geoscience suggest about the formation of valleys on Mars?

• They were formed by flowing rivers.

• They were formed by volcanic activity.

• They were formed by wind erosion.

• They were formed by glaciers.

Which location on Earth is considered a good analog for Mars according to the study?

• Greenland

• Devon Island

• Antarctica

• Siberia

What role did the scientists' algorithms play in the study?

• They simulated the atmosphere of Mars.

• They indicated that ancient glaciers could have formed valleys on Mars.

• They predicted future climate changes on Mars.

• They calculated the age of Martian rocks.

How might ancient glaciers have affected the potential for life on Mars?

• By creating more oxygen.

• By deflecting solar radiation.

• By warming the planet.

• By increasing volcanic activity.

What is the significance of the ice sheets in the context of ancient life on Mars?

• They would have melted completely.

• They would have increased solar radiation.

• They would have caused massive flooding.

• They would have deflected solar radiation, aiding survival.