But still the oldest known sample of the Red Planet
The oldest known Martian meteorite isn’t so old after all. Though it’s still the oldest chunk of Mars scientists have ever found, new research suggests the Allan Hills meteorite — officially known as ALH84001 — is about 400 million years younger than previously estimated.
A new analysis published in the April 15 Science pegs the meteorite’s age at a mere 4.091 billion years. Previously the meteorite was commonly accepted to have formed 4.51 billion years ago, when the planet’s surface was still solidifying out of its primordial magma ocean. But the new age indicates