One of the oldest rocks in existence, the Murchison Meteorite. It’s 4.5 billion years old, and likely existed before the Earth itself had completely formed. Interestingly, it also contains amino acids, the chemical building blocks of DNA.

One of the oldest rocks in existence, the Murchison Meteorite. It's 4.5 billion years old, and likely existed before the Earth itself had completely formed. Interestingly, it also contains amino acids, the chemical building blocks of DNA.