Earth

NASA satellites have observed the Antarctic ozone hole since the late 1970s — before and after nations agreed to stop producing chemicals that destroy the ozone layer. Instrument: Aura — OMI. (Image: NASA)

Iodine May Slow Ozone Layer Recovery

A new paper quantifying small levels of iodine in Earth’s stratosphere could help explain why some of the planet’s protective ozone layer isn’t healing as fast as expected. The paper posits a set of connections that link air pollution near…

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Iodine May Slow Ozone Layer Recovery

A new paper quantifying small levels of iodine in Earth’s stratosphere could help explain why some of the planet’s protective ozone layer isn’t healing as fast as expected. The paper…

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What Makes the Surface of the Earth Move?

Do tectonic plates move because of motion in the Earth’s mantle, or is the mantle driven by the movement of the plates? Or could it be that this question is…

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What Delayed Earth’s Oxygenation?

Powering a massive biosphere on Earth, photosynthesis is the light-mediated reaction that converts carbon dioxide and water to carbohydrates and oxygen. About 2.3 billion years ago, this reaction led to…

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Magnetism Discovered in the Earth’s Mantle

The huge magnetic field that surrounds the Earth, protecting it from radiation and charged particles from space — which many animals even use for orientation purposes — is changing all…

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Researchers Confirm Earth’s Inner Core Is Solid

A new study by researchers at The Australian National University (ANU) could help us understand how our planet was formed. Associate Professor Hrvoje Tkalčić and Ph.D. Scholar Thanh-Son Phạm are…

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Why Earth’s Oceanic Plates Suddenly Stop

Researchers at CU Boulder report that they may have solved a geophysical mystery, pinning down the likely cause of a phenomenon that resembles a wrench in the engine of the…

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New Kind of Aurora Is Not an Aurora At All

Thin ribbons of purple and white light that sometimes appear in the night sky were dubbed a new type of aurora when brought to scientists’ attention in 2016. But new…