NASA Smashed into an Asteroid in 2022. The Debris Could End Up Reaching Earth

NASA's 2022 DART mission "successfully demonstrated how a fast-moving spacecraft could change an asteroid's trajectory by crashing into it," remembers Gizmodo, "potentially providing a way to defend Earth — though the asteroid in this test was never a real threat."
But a followup study suggests debris from that 525-foot (160-meter) asteroid "could actually strike back," they add, "though we're not in any danger."
The [DART] team posits that the collision produced a field of rocky ejecta th