[gameoverhumans]

Agreed, humanity is unlikely to survive an asteroid of the likes that wiped out the dinosaurs, considering it increased global atmospheric temperatures to several hundred degrees celsius for a few minutes (or several thousand for a few seconds) (https://www.youtube.com/watch?v=dFCbJmgeHmA).

It doesn't look like we need the help of celestial bodies intersecting ours, though. We're ushering in our own demise just fine on our own, thank you very much!

[RandomLensman]

When and where are we currently ushering in our demise? None of climate models have us on trajectories close to global extinction - we are roughly on a 2-3 degree warming path at present.

This kind of doomsterism is just not useful.

[ClumsyPilot]

I don't think you understand what that number means at all.

24K years ago New York was under 4 miles of ice, during summer. If that happened today, do you think the government of Canada and United States would survive such a schenario?How many people would be left alive in North America, 30% of the current population?

How big do you think the change in global temperature was during the last ice age? 30 degrees or 20 degrees?

It was only 6 degrees. That's all it takes.

Average yearly temperature for Hong Kong is 23 degrees, for Dubai it's 26 degrees.

3 degrees is the difference between lush tripics and a desert where you will starve because nothing grows.

A global change of 3 degrees means 12 degree change on land because 70% of the planet is an ocean and it's tempersture doesn't change