# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2013-02-15 22:02:40 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/302538442108186624) In reply to: [@pilky](http://twitter.com/pilky/status/302536853326807041) @pilky Yeah, but less than 1% discovered, so who knows what’s out there. We need planetary defences, pronto!