Trying not to sneeze now. Part of the #CAVES2019 Commander’s tasks is measuring the CO2 level in this remote part of the cave, to make sure it is safe for the exploration crew to enter. pic.twitter.com/GCdbuUBcNq
Trying not to sneeze now. Part of the #CAVES2019 Commander’s tasks is measuring the CO2 level in this remote part of the cave, to make sure it is safe for the exploration crew to enter. pic.twitter.com/GCdbuUBcNq
