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When an orca grandmother dies, her grandcalves are 4.5x more likely to die within 2 years — even when salmon is plentiful.ILLUSTRATION · AI
Featured · Nature

When an orca grandmother dies, her grandcalves are 4.5x more likely to die within 2 years — even when salmon is plentiful.

In Pacific Northwest killer whale families, a grandmother's death makes her grandcalves roughly 4.5 times more likely to die within two years — even in years when salmon runs are strong.

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The northern lights aren't paint or magic — they're a collision. Particles hurled off the Sun slam into oxygen and nitrogen 60 miles up, and the sky glows where the atoms take the hit.
Space

The northern lights aren't paint or magic — they're a collision. Particles hurled off the Sun slam into oxygen and nitrogen 60 miles up, and the sky glows where the atoms take the hit.

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Antarctica's ice is so heavy it has pressed the bedrock nearly 1 kilometer down into the mantle. Strip the ice away, and the continent would keep rising for 10,000+ years.
Earth

Antarctica's ice is so heavy it has pressed the bedrock nearly 1 kilometer down into the mantle. Strip the ice away, and the continent would keep rising for 10,000+ years.

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Roman piers in the Bay of Naples are stronger now than the day they were poured — seawater reacts with the volcanic ash inside and grows crystals that knit the cracks shut.
Invention

Roman piers in the Bay of Naples are stronger now than the day they were poured — seawater reacts with the volcanic ash inside and grows crystals that knit the cracks shut.

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