On Wednesday, December 19, 2018 at 2:48:37 PM UTC-7, Jibini Kula Tumbili Kujisalimisha wrote:
StarDust wrote in
:

What would happen if the Earth's tilt would shift to 45 deg
suddenly or in a short period of time? Would we survive?

The amount of energy involved to cause that would vaporize the planet
and everything on it.

That depends on how you define "short". If it took a thousand years for the
Earth's inclination to change from 29 1/2 degrees to 45 degrees, that would
still be a lot quicker than anyone is expecting for such a thing to happen, but
it could be managed without vaporizing anything - but it would make it difficult
for life to adapt in time.

John Savard