Stephen Hawking—Both Right and Wrong

It was interesting to read an article about a warning from famed physicist Stephen Hawking that was summed up this way:

One way or another, the life on Earth will likely become uninhabitable for mankind in the future. We need to start seriously thinking about how we will free ourselves from the constraints of this dying planet.

The article is entitled,  "Stephen Hawking's Warning: Abandon Earth—Or Face Extinction," and includes these statements:

Let's face it: The planet is heating up, Earth's...