Traces of Life in the Earth’s Deep Mantle

Earth as seen from space.

The rapid development of fauna 540 million years ago has permanently changed the Earth — deep into its lower mantle. (Image: via Pixabay)

The Krypton Found in the Earth’s Deep Mantle Reveals Its Exciting Outer Solar System Ancestry

Early solar system.

The different isotopes of krypton are chemical fingerprints for scientists sleuthing out the ingredients that made the Earth, such as solar wind particles and meteorites from the inner and outer solar system. (Image: via Pixabay)