Complex life origin.

[Manticore]

The origin of complex life on Earth just got a little less mysterious

https://arstechnica.co.uk/science/2017/08/the-origin-of-complex-life-on-earth-just-got-a-little-less-mysterious/

[Area54]

It also got a lot less likely. If the juxtaposition of two glaciations in close proximity is necessary for complex life to develop, then it is less likely to have occurred on other planets.