Hawking Supports Tiny Spacecraft To Alpha Centauri

We know that Earth will die. Even if we beat global warming, and survive long enough to face and survive the next ice age, Earth will still die. Even if we build a peaceful civilization, protect the planet from asteroids, fight off mutant plagues and whatever else comes our way, life on Earth will die. No matter what we do, the Sun will reach the end of its life, and render Earth uninhabitable. So reaching for the stars is imperative. What sounds unrealistic to a great many people is a matter of...