In Ancient Rocks, Scientists See a Climate Cycle Working Across Deep Time

ENN
May 7, 2018, 4:46 pm40 pts
Scientists drilling deep into ancient rocks in the Arizona desert say they have documented a gradual shift in Earth’s orbit that repeats regularly every 405,000 years, playing a role in natural climate swings. Astrophysicists have long hypothesized that the cycle exists based on calculations of celestial…

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