A cosmic coincidence could give us an unprecedented look at a visitor from another solar system. If all goes well.

NASA has sent five robotic vehicles to Mars. Sojourner, Spirit, Opportunity, Curiosity, and Perseverance. Look back at the missions. (NASA/AFP via Getty Images) Martian mudstones contain features that ...

NASA's Perseverance rover may have uncovered hints of ancient Martian life, but China's Tianwen 3 mission could be the first to deliver samples back to Earth.

A recent close-up shows a turtle-shaped rock on the surface of Mars, captured by NASA's Perseverance rover. As NASA's Perseverance rover, a car-sized robotic explorer, looks for signs of possible ...