Lake sediments in a Siberian crater show that the last time atmospheric carbon dioxide was at present levels, global temperatures were 14.4 degrees hotter, forests covered the tundra and sea levels were up to 130 feet higher than they are today.
Seeing as we’re not doing so well with our planetary preservation program here on Earth, it might be prudent to consider the possibility of shopping around the universe for a new home at some point in the not-too-distant future. But how do we know which heavenly bodies are ripe for the human ruination treatment?