The Moon could be 40 million years older

A lunar rock collected by Apollo 17 astronauts suggests that the Moon formed 40 million years earlier than thought. The Moon was born when a Mars-sized object slammed into Earth around 4.5 billion years ago, although the exact timeline of when the molten Moon solidified remains unclear. A re-analysis of one of these rock samples discovered what might be the oldest lunar material: 4.46-billion-year-old zircon crystals.