NPR: A.Q. Khan, a Pakistani engineer who bought and sold nuclear knowledge and supplies in the international black market, appears to be safe from prosecution. Pakistan isn’t pursuing charges against him, and cases in Germany and Switzerland are languishing. Meanwhile, experts say Khan’s network is still up and running.
The finding that the Saturnian moon may host layers of icy slush instead of a global ocean could change how planetary scientists think about other icy moons as well.
Modeling the shapes of tree branches, neurons, and blood vessels is a thorny problem, but researchers have just discovered that much of the math has already been done.
January 29, 2026 12:52 PM
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