Part of the moon's surface is much older than experts previously thought, with many of the craters pockmarking the iconic "man in the moon" predating that landform by hundreds of millions of years, new research finds.
The moon itself is just over 4.5 billion years old. It formed when a huge asteroid or planetary body slammed into the young Earth, throwing chunks of rock and dust into orbit. However, determining the age of the lunar surface has been tricky, as various methods return different results.
