Then there are minimal influences - like the Planet 9 (X), which they have all mathematically proven that it is out there orbiting the sun and plays a major influence on our system. This is a major coup for the Astrologers who always said it was out there to begin with.
Also the likely chance in our lifetime that we will see a Hyper-Nova in our skies for decades, that will brighten the southern Hemisphere like a permanent moonshine.

Methane sucks though. The biggest mass extinction (90%) was due to an increase in Methane into the atmosphere.

Jasin wrote on Nov 13^th, 2017 at 2:16pm:



Prof. Peter Wadhams -
"He was one of the authors of a paper in the journal Nature, which suggested it was possible for a truly vast amount of frozen methane to be released over just 10 years – a blink of an eye in geological terms.

“We were concerned if there were a 50 gigatonne release, about eight per cent of the methane in the hydrates, that would give an immediate 0.6°C of global warming, which is a very large pulse indeed,” Professor Wadhams said.

“That modern threat is very real and very serious and has been disregarded a lot by the Intergovernmental Panel on Climate Change … I feel strongly about it.”

However, Professor Wadhams criticised the title of the Palaeoworld paper, which was “Methane hydrate: Killer cause of Earth’s greatest mass extinction”.

“There’s a serious tendency these days to offer a breathless overkill on the importance of a discovery. The title of the paper is over the top,” he said.

“Methane may or may not be the cause of the extinctions described. The evidence is equivocal. It doesn’t justify all the razzamatazz.” "

reported in
http://www.independent.co.uk/environment/earth-permian-mass-extinction-apocalyps...

So much less certainty.