As a followup to THIS POST from 2019, scientists have determined that the asteroid or comet that struck the Yucatan around 66 million years ago, ending the era of the dinosaurs, hit during springtime:

‘Frozen in place’ fossils reveal dinosaur-killing asteroid struck in spring

A site in North Dakota shows a bunch of fish who had all died within 30 minutes of the impact, jumbled up with tree branches as whatnot due to the wave that rolled through and stirred everything up. I imagine there is, or will be, a hell of a market for fossils from that site; it’s one of the few places on the planet where you have fossils pointing to one exact, understandable and important moment in time. “This specific animal was killed by *the* impactor” is a heck of a notion.