在地球形成之初，小行星和微行星的频繁撞击塑造了地壳，并创造出可能支持前生物化学反应、甚至可能孕育早期生命的环境。
early Earth
Posted inResearch Spotlights
Cosmic Bombardment Created Potential for Prebiotic Chemistry
Frequent impacts from asteroids and planetesimals in Earth’s earliest days shaped the planet’s crust and created environments that may have supported prebiotic chemistry, and possibly even early life.
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Zircon Crystals Could Reveal Earth’s Path Among the Stars
Researchers found signs of melting in zircon crystals in the crust that correspond to our planet’s journey through the galaxy’s spiral arms.
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Bacteria Battled for Iron in Earth’s Early Oceans
Billions of years ago, iron-oxidizing microbes may have competed for dissolved iron in the ocean, with some strains producing toxic gases that smothered their rivals.
Posted inResearch Spotlights
How Did Magma Oceans Evolve on Early Earth and Mars?
New insights into the early timelines of rocky planets are emerging, thanks to clues from iron chemistry and primordial atmospheres.
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Lost City’s Plumbing Exposed by the Longest Mantle Core Ever Drilled
The core, which is 71% complete, reveals millions of years of geologic history and the plumbing underlying hydrothermal vents.
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Circones de 4,000 millones de años podrían contener nuestras evidencias más antiguas de la existencia de agua dulce
Cristales australianos apuntan a la existencia de agua dulce, así como de continentes que se elevaban sobre el océano Hadeano de la Tierra.
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Sedimentos radiactivos podrían haber construido los cratones de la Tierra
La meteorización de los primeros continentes podría haber puesto en marcha la formación de cratones, las raíces inmutables de los continentes.
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Four-Billion-Year-Old Zircons May Contain Our Earliest Evidence of Fresh Water
Australian crystals hint at fresh water, as well as land rising above Earth’s Hadean ocean.
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Radioactive Sediments May Have Built Earth’s Cratons
Weathering of the earliest continents could have set in motion the formation of cratons, the immutable roots of continents.