Petr — Person Summaries
AI-powered summaries of 4 videos about Petr.
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How Japanese Masters Turn Sand Into Swords
Japanese swordmaking is presented as a tightly linked chain of chemistry, materials engineering, and craftsmanship—starting with iron-rich sand and...
The Most Important Material Ever Made
Unbreakable glass isn’t here—but modern “tough” glass has become durable enough to underpin everyday technology, from smartphones to scientific...
The Rainiest Place On Earth
A giant rainfall simulator in Tsukuba, Japan can reproduce the most intense rainfall ever recorded—down to the millimeter per hour—so researchers can...
This Is the Oldest, Weirdest Instrument On Earth
A limestone cave in Luray, Virginia houses the Great Stalacpipe Organ—an unusual “organ” that turns naturally formed stalactites into musical notes...