Summary:
- NASA's Mars Curiosity rover has been observing mysterious streaks on the surface of Mars for years, and scientists may have finally figured out what's causing them.
- The streaks are likely caused by dry ice, or frozen carbon dioxide, sliding down the slopes of the Gale Crater on Mars. This is not great news, as it suggests the Martian environment is even more extreme than previously thought.
- The discovery of these dry ice streaks provides valuable information about the climate and weather patterns on Mars, which is important for understanding the planet's potential for supporting life and future human exploration.