Many meteorites have been recovered on Earth. These are the remnants of meteoroids that have penetrated the Earth's atmosphere and landed on the Earth.
a. Why are these recovered objects interesting to scientists? What can they tell us about the Solar System?
b. What was discovered in the famous "Martian Meteorite" (also known as ALH84001) that led some scientists to suggest that it included evidence for life on Mars? Is this evidence still considered firm? What alternative explanations for the unique formations seen in this meteorite can you propose?