PBS's Nova last nite

[Colin]

Anyone else see the Nova special on last night about diving under the glaciers near Mont Blanc, France? Very interesting, challenging and dangerous for the divers. They talked briefly about using argon in their drysuits, along with regulator free-flows (one diver even spoke of getting ice crystals shot down his throat from his Poseidon reg). Zinc oxide was used on all exposed face skin, and even with that the team leader got his lips frostbitten. They had to rappel down about 60 feet into a crevasse and then don the scuba gear to do the dive to about 80 feet.
They were looking for evidence of hidden lakes formed by melting water inside the glacier that can unexpectedly cause the side of the glacier to burst open, flooding the surrounding valley. Visibility was limited due to the partially frozen water crystals, so the divers were literally suspended in water just on the verge of freezing solid.

Not exactly your average dive.

I can just imagine the call to DAN.