isotope ratios

50-Year-Old Lunar Samples are Opened up for the First Time

NASA's Apollo missions to the Moon brought back about 382 kilograms (842 pounds) of samples, including rocks, rock cores, rock,…

5 months ago

Water was Already Here Before the Earth Formed

Where did Earth's water come from? That's one of the most compelling questions in the ongoing effort to understand life's…

6 months ago