Arms Control Today: On Oct. 9, North Korea announced that it had carried out an underground nuclear test. In subsequent days, the apparent low yield of the device and initial lack of reports of detection of radioactivity from the test raised questions about whether North Korea had actually tested a nuclear device or if a test had failed.
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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