A 'remelting' of lunar surface adds a wrinkle to mystery of Moon's true age
Much about the Moon remains shrouded in mystery, including its age. Analyses of samples brought back from the lunar surface indicate our celestial sidekick could be about 4.35 billion years old, which means it came to be at about 200 million years after the formation of our solar system. But that immense lag doesn't sit well with some scientists. During the solar system's early days, debri