https://thenextweb.com/syndication/2019/02/27/asteroid-powered-volcanoes-killed-the-dinosaurs-scientists-say/

It’s almost 40 years since scientists discovered what wiped out the dinosaurs: an asteroid hitting Earthnear modern-dayMexico. That was it, or so we thought.A paper published today in Science further supports an alternative hypothesis: that catastrophic events following the impact could have helped cause the end of the dinosaurs and many other forms of life.

This builds on earlier work – including some published last year – suggesting a connection between the asteroid impact, increased volcanic eruptions, and the mass extinction event.