Meteorites
Researchers in China have discovered a well-preserved impact crater in Guangdong Province, dating to the early-to-mid Holocene epoch around 11,700 years ago. The 900-meter-wide Jinlin crater is the largest verified from this period, surpassing Russia's Macha crater. It provides new insights into recent meteorite strikes on Earth.
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New simulations from Rice University reveal that Jupiter's rapid early expansion created gaps and rings in the protoplanetary disk, delaying the formation of certain planetesimals. This process explains the late birth of chondrite meteorites and why Earth and other rocky planets stayed near 1 AU from the sun. The findings, published in Science Advances, tie together isotopic evidence and planetary dynamics.