ScienceNow: Darth Vader might be disappointed to hear it, but the force of gravity does not have a dark side. Dark matter does not pull on other dark matter with any extra gravity or additional force, as some researchers have suggested, a pair of theoretical physicists reports. Based on observations of a pip-squeak galaxy orbiting our own, more massive, Milky Way galaxy, the argument could shoot down theories invented to explain other puzzling observations. Some researchers are skeptical, however.
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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