[xxqqzz]

They didn’t test it driving it on snow until taking it to Antartica. It carried 5,000 gallons of diesel fuel, which should weigh about 15 tons.

[redangus]

Wouldn’t diesel fuel have gelled at Antarctic temperatures?

[Dr. Franklin]

They didn’t test it driving it on snow until taking it to Antartica. It carried 5,000 gallons of diesel fuel, which should weigh about 15 tons.

If it is full of diesel fuel, that would aid its buoyancy, since diesel fuel is less dense the water. No one has seen it floating around anywhere.