Simulations of highly magnetized stars that explode and collapse into black holes show that they transfer their magnetic fields to the disk of swirling matter that forms around the new black hole.

A robot made of magnetic slime with a custard-like consistency can navigate narrow passages, grasp objects and fix broken circuits. It could be deployed inside the body to perform tasks such as ...

More information: Anna M. E. B. Rossi et al, Topologically cloaked magnetic colloidal transport, Nature Communications (2025) ...