Beneath cold craters, a melted lunar heart
It takes two and a half seconds for a laser beam to flash from Earth to the moon and back again. But it has taken 33 years of doing such experiments for scientists to glimpse what may be the moon's
It takes two and a half seconds for a laser beam to flash from Earth to the moon and back again. But it has taken 33 years of doing such experiments for scientists to glimpse what may be the moon's