Mon, 19 Dec 2016 22:05:31 +0000 https://www.sciencenew...behinds-way-we-look-faces


Wild Things




Animals,


Evolution


This tale of rising continents may be overly simplistic, said Laurent Montési, a geodynamicist at the University of Maryland in College Park. Other factors such as the mass of the continents, the amount of water in the oceans and the rate of new crust formation on the seafloor could affect sea levels relative to the continents. The idea is worth considering, he said, “but the evidence is not completely there yet.”
Editor’s note: This story was updated December 21, 2016, to clarify the description of life that emerged during the Cambrian explosion.
The new land would have altered carbon and nutrient cycles, Lee suggested. These effects could help explain large shifts in Earth’s climate around this time and might have nourished the Cambrian explosion. During that time, around 540 million to 500 million years ago, forerunners of the major groups of animals — from insects to mammals — first emerged.
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