As the planet faces the dawn of a sixth mass extinction, scientists are searching for clues about the uncertain road ahead by exploring how an ancient ecosystem collapsed and bounced back from traumatic upheavals. A new study follows the lengthy collapses and revival of South African ecosystems during one of the “big five” mass extinctions, the Permian-Triassic event, revealing unexpected […]
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The planet’s inexorable warming means there will be no new ice age for at least the next 100,000 years, scientists say. Human beings have not just started to leave a unique geological stratum that will announce their existence long after the species has been extinguished. They may have altered a climate cycle that has been stable for millions of years and even […]
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Earth’s magnetic field is weakening, and could all but disappear within the next 500 years—exposing our planet to intense solar radiation that would scour its surface of life, Reuters.com reports. Researchers say I the geological record indicates that Earth’s * magnetic field tends to switch polarity f every 250,000 years—and that it’s about 550,000 years overdue for a swap, which […]
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“Knowing what a chicken looks like and what all the chickens before it looked like doesn’t help us to understand the egg,” says Taras Gerya. The ETH Professor of Geophysics uses this metaphor to address plate tectonics and the early history of the Earth. The Earth’s lithosphere is divided into several plates that are in constant motion, and today’s geologists […]
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America’s earthquake epicenter was once California. Now it’s Oklahoma. In 2014 there were nearly 300 times as many magnitude 3.0 and greater earthquakes as there were in 2008—and more quakes of that magnitude than in the prior 30 years combined. The cause? Scientists can’t say definitively, but new research funded by the U.S. Geological Survey notes that as quakes increased […]
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