Michio Kaku

"One in 200 stars has habitable Earth-like planets surrounding it - in the galaxy, half a billion stars have Earth-like planets going around them - that's huge, half a billion. So when we look at the night sky, it makes sense that someone is looking back at us."

- Michio Kaku

"What we usually consider as impossible are simply engineering problems... there's no law of physics preventing them."

- Michio Kaku