Is the Extinction of Erth a Certain?

If we never expand beyond earth, then i don't think the that this life span of humanity will be long. I hope we get to mars and start expanding even daty planets. The most amount of species death was the permiant extinction. Most likely a pyelso is a gigantic volcano. You can really go down deep in rabbit hole if you're not careful. Earth's climate changes pretty radically over the course of ten thousand years or so. We'll see that one coming. There are five great extinctions which have wiped out 70-80% of all living things on earth. A year ago Cranatoa went off its face when it had an ash cloud for two weeks.