AI Image

Scientists make discovery that upends Earth origin story

geekspin • September 17, 2026 • science

Key Points:

A new study from ETH Zurich reveals that Earth formed almost entirely from material within the inner Solar System, challenging previous theories that included significant contributions from beyond Jupiter.
Researchers analyzed 10 different isotope systems in meteorites and found Earth's composition aligns with non-carbonaceous meteorites from the inner Solar System, showing little evidence of outer Solar System material.
Jupiter's early formation likely acted as a barrier, preventing much of the outer Solar System's water- and carbon-rich material from mixing with the inner Solar System where Earth formed.
The study also suggests that Mars and the asteroid Vesta share a similar local material source with Earth, and Mercury and Venus might as well, though rock samples from those planets are currently unavailable for confirmation.
A key remaining question is how Earth acquired its abundant water if it formed primarily from dry inner Solar System material; researchers plan to explore this mystery in future studies.

Trending Business