The asteriod, that is.
WikiP
(There's also a Ted-talk on the topic, if you like vicarious-Horror-showz)

tl;dr threat downgraded (via all those stat-compilations) since 2004, 2006 ...
keyhole is half-a-Km so you can't stew over the {lo-lo-probability} of THIS ...
... transcending the other Tipping-Points on the radar.

tl;dr ... unless you Like being a masochist (?)

Mass-Movement needed: Get Wiki-P a Nobel for its service to ∑-Humanity
(And yesss.. I Will drop 'them' a note, too).
That collection is indeed simply a superb demo of how bitchin 'optics' quite supersede all the formulae (which we think.. we sorta grok).

When I see these demos--and recall incremental refinements--over a couple decades, each time I think:
Shit! IF.. I'd seen the animations of (say) *Newtonian laws (using similar cartoons WITH-the fornulae!)--each step of the way: I'd have grokked-to-Fullness very much which needed pain&suffering to inculcate. Maybe that's a Duh, but--I coulda used the Time+realizations to get lots smarter than whatever present-state..
* Decades ago I saw a regular program by a Brit Maestro of 'imparting' wherein the 'F=MA' and derivatives flashed the formulas plus animations 'across' each element of same; an Aha! Moment re (all today's refinements) PBS of course.

tl;dr
If only I coulda-known what I didn't know I Needed to fucking-Know!
(Yeah.. That's how cliches are born just after, IF ONLY ... ...
This series is no less than, Proof of (that) Concept, I wot.

So thanks again for your er, more thorough 'reading' :-)