Re: poll ideas quest 2016 (ET)

[Arunbear]

Extraterrestrials haven't visited the Earth yet because:

• There aren't any suitably capable Extraterrestrials
• Interstellar travel is too difficult
• We're too backward / not worth the trouble
• They have visited, but we are unaware of them
• Other reason

Inspired by the recent discovery of Proxima Centauri b

[chacham]

What do you mean they haven't? :)