Some asteroids are very hard to break

Image courtesy of JAXA.     

Joel Kontinen

Some asteroids are very hard to break. According to evolution, dust particles survived at least 4.2 billion years or near the age of the solar system. 

The Japanese gathered dust from the ´surface of a 500 meter or 1640 foot long Itokawa, and it would seem that they are harder to destroy than previously thought, - 

"NASA tracks the locations and orbits of roughly 28,000 asteroids", some of which might be deadly to us.   

Source:  

Turner,  Ben. 2023, Primordial asteroids are like giant space pillows and could be harder to destroy than previously thought Live Science 23 January,