Los Angeles Times: During a third spacewalk at the International Space Station on Monday, NASA astronauts Doug Wheelock and Tracy Caldwell Dyson (shown here) successfully replaced the cooling pump that had broken on 31 July. The station uses two pumps to keep it from overheating; with one pump out of commission, the crew had shut down nonessential equipment to avoid taxing the system until the repair could be effected. Tests showed that the new pump was working and that everything should be back to normal in a few days.
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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