14:48:33 +07:00 Paleontologists say mass extinctions on Earth follow a 27 million year cycle - Interesting article that describes the theory that there is another star in a massive orbit that periodically causes lots of comets to be slung at the earth, it doesn’t get into any predictions but it does note that the last mass extinction event was at the end of the Cretaceous period 65 million years ago# www.slashgear.com