Doh!
they seem to have forgotten to mention
why that meteorite is important!
By precisely dating(*) Mare Imbrium, the youngest of the large meteorite craters on the moon to 3.9 billion years ago;
this is a
key event, because life on Earth would have evolved only after the `heavy meteorite bombardment` ended...(the crust would have been molten)
(*)By analysing beryllium and carbon isotopes it told how long the meteorite was in space after it was launched from the moon and how long ago it fell to Earth.
By tested it with a Geiger counter, they found it contained high levels of radioactive uranium, thorium and potassium. The ratios between these elements fit only one enigmatic group of lunar rocks called "
KREEP," the acronym of K for potassium, REE for rare earth elements, and P for phosphate.
The Imbrium impact basin on the lunar nearside is the only area where KREEP rocks are found. This is known from samples returned by the Apollo missions and by NASA's Lunar Prospector Orbiter radioactivity survey in 1998-99.
