These Tiny Crystals Are ‘Time Capsules’ of Earth’s Early Plate Tectonic Activity

These Tiny Crystals Are ‘Time Capsules’ of Earth’s Early Plate Tectonic Activity

Tiny crystals of zircon dated to 3.8 billion years ago contain the earliest geochemical evidence yet for plate tectonic activity here on Earth. Isotopes and trace elements preserved in the crystals show evidence that they formed under subduction conditions – when the edge of one tectonic plate slips beneath the edge of the adjacent plate, … Read more

Primordial Helium From Billions of Years Ago Seems to Be Leaking Out of Earth’s Core

Primordial Helium From Billions of Years Ago Seems to Be Leaking Out of Earth’s Core

Ancient, primordial helium that was forged in the wake of the Big Bang is leaking from Earth’s core, scientists report in a new study. There’s no cause for alarm. Earth isn’t deflating like a sad balloon. What it does mean is that Earth formed inside a solar nebula – the molecular cloud that gave birth … Read more