What Will Cause Human Extinction

[sanjay]

During this pandemic when there are limited activities to engage brain, I often use it to think things that is impossible to predict accurately.
Lately I discovered and read about when first human arrived, how modern humans formed and how they spread across world. Seeing life span, I guess human is going to live for now for many years.. may be millions. Or may be some other sub species of human ?

But one day everyone has to go for extinction (Sun in 5 billion years). I am wondering how long human will survive before going to extinction and what could be the possible reason? What other possible species or sub species will take replace human?

Is it also possible we colonize in other planets and able to live more ? Does species from past (dinosaurs etc) lived longer duration due to better basic instincts ? Will human outlive them or we are worst species when it comes to life span duration on earth ?

You know.. many hypothetical questions but these questions increase my faith on things which is beyond science or non science Reply