Day 2 #NASA #OxyMoRon team is going sampling 1 billion-year old brines at 2900 m depth below surface. Walking 4km in the heat and dusty tunnels to get to our site and back. #mblscience ⚒️🧪 #darkoxygen #deeplife #microbiome @karenlloyd.bsky.social @jamesdinneen.bsky.social @hfspo.bsky.social