A special collection of articles published in “Journal of Geophysical Research: Planets” reports the results of various researches on asteroid Bennu, in some cases already published in recent months. Various researchers used data collected by NASA’s OSIRIS-REx space probe getting some surprises about what happens on Bennu such as the loss of materials being ejected into space. Possible causes include meteoroids, thermal stress, and the ricochet of particles that fall back to the surface then bounce back into space. Bennu’s activity could only be noticed by a nearby space probe, and this raises the question of the possible activity of other asteroids.