physics

Meet the Pint-Sized Robots That Spontaneously Dance

Meet the Pint-Sized Robots That Spontaneously Dance

In January 2020, a second-floor lab at Northwestern University was filled with the mild-mannered clacking of three robots pushing each other around. The trio were in a small ring as they hit against one another, though the petite robots weren’t the rock ‘em, sock ‘em variety. These were smart, active…