Where the giant dinosaur-killing asteroid came from

The video explains the Chicxulub impact, believed to have caused the extinction of dinosaurs, as a result of a dark primitive asteroid from the outer reaches of the solar system's main asteroid belt. This region contains many dark asteroids with a unique chemical composition. Geochemical analysis suggests the impacting object was a carbonaceous chondrite, a primitive meteorite type. Simulations show that thermal forces and gravitational influences periodically propel large asteroids from the belt, with significant collisions occurring every 250 million years.

What is the significance of carbonaceous chondrites in the context of the Chicxulub impact?

How often was an asteroid more than six miles wide flung into a collision course with Earth?