Article Details 10 Ancient Earth Events From 2-Billion-Year Reactors to 35% Oxygen Atmospheres
Updated
Updated · Listverse · Aug 5
Article Details 10 Ancient Earth Events From 2-Billion-Year Reactors to 35% Oxygen Atmospheres
1 articles · Updated · Listverse · Aug 5
Summary
Ten episodes from Earth’s past are presented as science-fiction-like but evidence-based, ranging from natural nuclear reactors in Gabon about 2 billion years ago to Antarctica’s 90-million-year-old temperate rainforest.
2.4 billion years ago, the Great Oxidation Event turned oxygen into a toxin for anaerobic life, while Cryogenian “Snowball Earth” freezes and later volcanic CO2 buildup showed how sharply the planet’s climate could swing.
66 million years ago, the Chicxulub impact that wiped out about 75% of species may also have created a 100,000-year underground hydrothermal refuge for microbes beneath the crater.
Other examples include the Mediterranean’s refill around 5.33 million years ago at flows near 1,000 times the Amazon, and Carboniferous oxygen levels of 30% to 35% that helped giant insects evolve.
Taken together, the list argues that Earth’s own history—from 8-meter Prototaxites to bipedal crocodile relatives—was often stranger than imagined alien worlds.