Earth formed alongside the rest of the solar system roughly 4.6 billion years ago. The oldest rocks we’ve found to date are about 4.03 billion years old, but the oldest earth minerals ever discovered were actually found in lunar samples and date to about 4.1 billion years.
Now, scientists believe they’ve discovered the oldest material ever found on Earth: microscopic specs of dust pulled from meteorite dated at 7.5 billion years old, according to research published January 13 in the journal Proceedings of the National Academy of Sciences…
The meteorite in which the grains were found is one of the most well-studied meteorites on Earth. The 220-pound Murchison meteorite plummeted to Victoria, Australia on September 28, 1969. (There were witnesses, too—a rare treat for studied meteorites.) It’s a type of meteorite called a carbonaceous chondrite…
The scientists took a small sample of the extraterrestrial rock and crushed it into a fine powder for analysis. They then turned it into a paste, which, according to the BBC, smells like rotten peanut butter. The grains were then dissolved out and dated using an isotope of the element neon, Ne-21.
RTFA. A milestone.
Confirming my wife’s theory there are 5 – not 4 – basic elements to the universe. Air, earth, fire, water…and peanut butter.