Geochemistry
Analysis of 3.3 billion-year-old olivine crystals suggests Earth's Hadean Eon featured intense subduction and early continent formation. This challenges the long-held stagnant lid hypothesis for the planet's infancy. Researchers combined geochemistry and geodynamic models to uncover this dynamic past.
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A new study suggests that billions of years ago, Earth's young atmosphere naturally generated sulfur-based molecules essential for life, challenging previous assumptions. Researchers from the University of Colorado Boulder simulated ancient conditions and found production of amino acids like cysteine and taurine. This discovery implies that the planet may have been pre-stocked with life's building blocks before organisms emerged.