Comments on: Before humans can settle on Mars, planetary scientist Philip Metzger says we need to figure out these three key technologies

Comments on: Before humans can settle on Mars, planetary scientist Philip Metzger says we need to figure out these three key technologies https://lifeboat.com/blog/2017/04/before-humans-can-settle-on-mars-planetary-scientist-philip-metzger-says-we-need-to-figure-out-these-three-key-technologies Safeguarding Humanity Sun, 04 Jun 2017 14:06:19 +0000 hourly 1 https://wordpress.org/?v=6.6.2