1964 Good Friday earthquake stress release

A quake released centuries of stress in minutes

4 min 38 sec

The 1964 Good Friday earthquake ruptured 600 miles of fault and moved the ground as much as 60 feet. It released roughly 500 years of accumulated stress in 4 minutes and 38 seconds.

Civil War records helped lead to punch-card computing

Work on U.S. Civil War medical and population records helped John Shaw Billings think about turning facts into numbers that machines could sort. His assistant Herman Hollerith later developed punch-card machines. Punch cards dominated large-scale data processing for decades, and Hollerith's company eventually became part of IBM.

Jellyfish can release free-stinging cell balls

When triggered, the jellyfish Cassiopea xamachana releases tiny balls of cells that move on their own. They can sting anything they encounter, even when they are away from the jellyfish.

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1964 Good Friday earthquake stress release

A quake released centuries of stress in minutes

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