Weird, 'watermelon shape' asteroids like Dimorphos and Selam may finally have an explanation 

 New research finds why some asteroids have weird, watermelon-shaped moons trapped in orbit around them, contrary to what typical asteroid formation theories predict. 

https://cdn.mos.cms.futurecdn.net/SesDpJeGNZnVWifTQ3HrG4.png

https://www.space.com/watermelon-shape-asteroids-like-dimorphos-may-have-explanation