Cataclysm

On the anniversary of the cataclysm, there was an upsurge in zombie attacks.

Tom lives in constant fear of a cataclysm.

Tom inadvertently caused the cataclysm.

For 135 million years, dinosaurs ruled the Earth as the dominant terrestrial vertebrates, from about 200 million years ago until the cataclysm that wiped them out 66 million years ago.

The Nibiru cataclysm is a supposed disastrous encounter between Earth and a large planetary object (either a collision or a near-miss) that certain groups believed would take place in the early 21st century. -Wikipedia

While the disaster capitalism complex does not deliberately scheme to create cataclysms on which it feeds (though Iraq may be a notable exception), there is plenty of evidence that its component industries work very hard indeed to make that current disastrous trends continue unchallenged.

Judging by the sedimentary composition of the crust, it appears that Altaaya once possessed an atmosphere thick enough to support some form of liquid. What cataclysm stripped the atmosphere and left the planet to freeze is not currently known.