Side-by-side images depict NASA’s Curiosity rover (illustration at left) and a moon buggy driven during the Apollo 16 mission. Credits: NASA/JPL-Caltech Full image and caption Apollo 17 astronauts drove a moon buggy across the lunar surface in 1972, measuring gravity with a special instrument. There are no astronauts on Mars,… Read more“Mars Buggy’ Curiosity Measures a Mountain’s Gravity”