While Olympian alpine ski racer Lindsey Vonn chose to compete with a torn ACL, it’s not a good idea for regular folks to exercise with intensity after a serious injury.

Axiom says its AI found solutions to several long-standing math problems, a sign of the technology’s steadily advancing reasoning capabilities.

Mathematician Richard Evan Schwartz of Brown University tackled the problem in a recent study by working backward from an existing polyhedral torus to answer questions about what would be needed to ...