The Earth is not only unique in the solar system. We are located in a radioactively calm corner of the Milky Way, in a single-star system (not that common) with

The Earth is not only unique in the solar system. We are located in a radioactively calm corner of the Milky Way, in a single-star system (not that common) with planets rotating in stable, non-intersecting orbits. And that's just the beginning of the factors that make the Earth so unique. So the next time you take that sip of coffee in the morning, just know that you can't do that for millions of light years around you - or maybe anywhere.