.@NASAAdmin Jared Isaacman thinks bringing Mars samples back could prove life once existed there. "I think the odds are extremely good you'd have direct evidence of once microbial life." "But I don't think, no matter how many robotic missions we land doing analysis that phone home and say: 'yeah, it's like 90% chance there was something there' — that anyone will buy it until we actually bring the samples back and make a conclusive statement." "If you're ever late night having cocktails with friends, looking up at the stars, and being like 'is life out there?' — people generally say, surely it must be somewhere. You've got 2 trillion galaxies, how many stars are in them, how many probably have planetary formations within a Goldilocks zone? Yeah, I'll take that bet." "We have missions to Europa Clipper that are out there searching for life. We've got a nuclear-powered octocopter that we're launching to Titan in 2028, searching for life." "If you start getting biosignatures from other worlds within our solar system, it changes the dynamic entirely — from 'surely it must be out there somewhere' to 'what if it's everywhere?' And it might be possible in our lifetimes to prove that." @rookisaacman(a16z)