NASA crashed a spacecraft into an asteroid in 2022, hoping the kinetic impact would nudge it off its orbit. The mission was called the Double Asteroid Redirection Test, or DART.

Four years later, scientists have published their findings and say the experiment was even more successful than expected.

Guest: Rahil Makadia, planetary defence scientist at the University of Illinois, Urbana-Champaign and co-author of Direct detection of an asteroid’s heliocentric deflection: The Didymos system after DART