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Friday Squid Blogging: How Squid Survived Extinction Events

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Full article120 words · extracted from schneier.com · click to collapse

Science news:

Scientists have finally cracked a long-standing mystery about squid and cuttlefish evolution by analyzing newly sequenced genomes alongside global datasets. The research reveals that these bizarre, intelligent creatures likely originated deep in the ocean over 100 million years ago, surviving mass extinction events by retreating into oxygen-rich deep-sea refuges. For millions of years, their evolution barely changed—until a dramatic post-extinction boom sparked rapid diversification as they moved into new shallow-water habitats.

As usual, you can also use this squid post to talk about the security stories in the news that I haven’t covered.

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Tags: squid

Posted on April 24, 2026 at 5:03 PM66 Comments

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Text extracted automatically; images, tables and formatting may be missing. Original: https://www.schneier.com/blog/archives/2026/04/friday-squid-blogging-how-squid-survived-extinction-events.html