In response to Neil deGrasse Tyson's suggestion that we should develop fully hack-proof systems, one Twitter user quipped that we should also develop umbombable cities and unkillable people. Blogger  Iowahawk joked that we should also be working on a dog that poops money. He didn’t know how that would work; let the scientists work out the details!

Hosts Phil Bowermaster and Stephen Gordon discuss the merits of grandiose ideas that are much easier to dream up than to implement. Are they always a waste of time or could there be some merit in Tyson's idea? Or even Iowahawk's?

PLUS: Phil and Stephen introduce some big ideas of their own.