"“My view is that we cannot be certain yet,” Garvin said, “except that subsurface habitats with liquid water must have existed at some depths and in the more modern record. Levin did not prove that with his Viking gas-exchange measurements of the upper 20 centimeters at the Viking Lander 1 site. "

Very revealing..Garvin thinks Levin's experiment was the Gas Exchange Experiment! Plus Levin conducted his Labeled Release Experiment nine times in all at Viking 1 and Viking 2, not just the viking 1 site. As usual another person at NASA who doesn't understand Viking but feels like an authority about it to the media. Typical.

BD