We are all living together on a single planet, which is threatened by our own actions. And if you don't have some… — Yuval Noah Harari Copy Share Image
I agree, along with Carl Sagan, that we should eventually become a two planet species. Life is too precious to place on… — Michio Kaku Copy Share Image
“And there will be someone that comes along one day and offers you an entire galaxy when you only expected a single… — Noor Shirazie Copy Share Image
When I was a kid, I was obsessed with different planets in the solar system, and I used to create, for every… — James Gunn Copy Share Image
There are too many accidents that can befall life on a single planet. — Stephen Hawking Copy Share Image
