Sixth Mass Extinction Driven by Human Activity
The Mini Page interview with Michael Brett-Surman explains mass extinctions, noting humans drive the current sixth extinction through climate change and habitat loss. It outlines how extinctions redress Earth's diversity, with past events like the Ordovician ending around 445 million years ago wiping out over half of life due to sea level drops and glaciers.
End of the Devonian and other mass extinctions summary
The Devonian ended about 370 million years ago with widespread animal and plant losses as oceans rose and fell and climate shifted. Plant growth cooled the atmosphere by drawing in CO2, while glaciers formed. Subsequent eras saw the Great Dying at 250 million years ago and other mass extinctions linked to volcanic activity, global warming, ocean changes, and an asteroid impact, ending with the demise of most dinosaurs at 65 million years ago and the survival of birds.
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Earth
Pangaea
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Endangered Look at Human Role in Mass Extinctions
A history of life loss over 20 000 years shows a dramatic drop in species diversity. Experts say current extinctions are 1000 times faster than normal and driven by human activity. Pollution climate change overhunting and habitat destruction are key factors. The text urges study science and action by today’s youth to safeguard Earth.
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Earth
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