Science: On 5 December, the heaviest rains in Colombia’s history triggered a landslide that wiped out a poor hillside community and left more than 145 people dead or missing, writes Sid Perkins for Science. He describes a series of experiments conducted by Richard Iverson and colleagues to try to determine how such sediment flows can grow to monstrous proportions. Iverson is a research hydrologist at the US Geological Survey in Vancouver, Washington.The team’s results were published online yesterday in Nature Geoscience.
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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