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Earth & Mars: Twin Planets, Wildly Different Births
22 Oct
Summary
- New simulations suggest Earth and Mars had distinct formation paths.
- Mars formed from large, asteroid-like objects, study indicates.
- Earth's formation primarily involved assembling small pebbles.
Scientists have uncovered compelling evidence that Earth and Mars, while neighbors and of similar age, experienced vastly different formation processes. Through sophisticated computer simulations that utilized chemical clues from both planets' rocks, researchers aimed to replicate their current states.
The findings, published in Nature Astronomy, indicate a significant divergence in their cosmic beginnings. Simulations suggest that Mars was largely assembled from substantial, asteroid-sized fragments. Conversely, Earth's accretion appears to have been dominated by a multitude of smaller, self-assembling pebbles.
This discovery offers new insights into Earth's acquisition of water billions of years ago. While comets and damp asteroids have been credited, the pebble-formation theory provides a complementary explanation, suggesting a continuous influx of icy material from the outer solar system played a crucial role in shaping our planet's habitability.
