7-billion-year-old rocks reveal how Earth and the Moon were born

Crystals hidden in Australias oldest rocks have revealed new clues about how Earth and the Moon formed. The study suggests Earths continents didnt begin growing until hundreds of millions of years after the planet itself formed. When scientists compared the rocks with Moon samples from the Apollo missions, they found a remarkable match. The results support the idea that a massive cosmic impact gave birth to the Moon.