Humans have another billion years left on Earth.

Question

I'm trying to understand the point of the Doomsday Clock when this source says humans have roughly 1.3 Billion years left on Earth before it becomes inhumanble

Answer 1

it is said that humans could possibly be in earth for another billion years according to this article. There is also an unknown piece to it that anything could happen at any time and is really impossible to predict the end of the earth by one thing, the sum swelling, and determine that is when we will last.https://www.scientificamerican.com/article/will-humans-ever-go-extinct/#:~:text=Eventually%20humans%20will%20go%20extinct,years%20is%20a%20long%20time.

Answer 2

This claim isn't necessarily true. The article mentions that in 1.3 billion years the earth will be uninhabitable for most organisms and that in 4.5 billion years the sun will engulf the earth. That means that we could have up to 4.5 billion years because we don't know if in 1.3 billion years humans won't be able to live on the planet. Also, there's no telling what can happen between then and now, and there's a possibility that humans can become extinct or that the planet will be uninhabitable sooner.