[boris]

"A possible second crater, at least as big or bigger than the famous Chicxulub crater off Mexico's Yucatan peninsula, may have been created by a second hit moments after Chicxulub and off the coast of Maine."

And how do they know it was "moments after"?

--Boris

[SteveH]

And how do they know it was "moments after"?

I imagine it has may have become rather fashionable to allude to multiple successive asteroid impacts after the Shoemacher-Levy Jupiter impact pattern...(?)