
Ancient moon volcanoes made tiny glass beads. Heres what they mean.
Tiny glass beads brought back by NASA‘s Apollo 17 astronauts are helping scientists uncover new clues about how the moon erupted billions of years ago. No one expected these glittering bits among the gray lunar dust back then. The beads, smaller than grains of sand, formed when ancient lunar volcanoes spewed molten rock. That rock…