Venkatesh Rao@vgrPossible issue with @worstall view of ore --> dirt being fn of tech is 2nd law. Extraction energy may require beyond-earth space-economics.9:28 PM · Apr 18, 2014
Venkatesh Rao@vgr·Apr 18, 2014Replying to @pmarca@pmarca @worstall My point being, since the 2nd law is an unbounded force, you may need to exit earth to solve some problems1
Venkatesh Rao@vgr·Apr 18, 2014Replying to @pmarca@pmarca @worstall For some minerals, asteroid mining might be cheaper than processing low-grade dirt on earth. Probably not P or K though.11
Dave Martinez@sfdavemartinez·Apr 18, 2014Replying to @pmarca@pmarca @vgr @worstall this is what were doing at skycorp at nasa me and Dennis wingo lets talk