http://www.sciencemag.org/news/2018/05/life-rebounded-just-years-after-dinosaur-killing-asteroid-struck

Artist’s depiction of a large asteroid impact.

When a 10-kilometer-wide asteroid hit the Gulf of Mexico 66 million years ago, it drove over 75% of Earth’s species to extinction, including the dinosaurs. But within just a few years, life returned to the submerged impact crater, according to a new analysis of sediments in the crater. Tiny marine creatures flourished thanks to the circulation of nutrient-rich water. That return of life could offer lessons in how marine ecosystems might recover after the dramatic shifts caused by climate change, the researchers suggest.