Discovered: A 5-mile wide undersea crater created as the dinosaurs disappeared
cnn.com
cnn.com
As I understand it, science is slowing updating this narrative. That is, it was actually excessive volcanic activity that was killing off the dinosaurs. The asteroid simply made shorter the inevitable.
p.s. The Atlantic article is interesting because it's also a story about how science is influenced by human nature.
https://www.theatlantic.com/magazine/archive/2018/09/dinosau...