There is no current scientific consensus as to how life originated.

Scientists don't know how life originated on Earth, after all.

This example is the problem of how life originated on Earth.

He developed a computer model to show how life on Earth could have originated in outer space.

That is the kind of environment in which the first life must have originated.

I am, and the theory that all life originated on one world.

They made no effort to establish how or exactly when life originated.

As yet, no one knows exactly how life originated on Earth.

But the life there couldn't have originated on that world.

It seems possible that life originated on Earth, but may have needed an assist from the rest of our solar system.