A shallow puddle of hyperconcentrated brine defies Antarctica's deep freeze, but the phenomenon is far more fragile and temporary than decades of popular science have suggested.
The short answer is salt. The more interesting answer is that Don Juan Pond is barely a pond in the ordinary sense of the word.
It sits in Antarcticas Upper Wright Valley, one of the McMurdo Dry Val… [+8436 chars]
It sits in Antarcticas Upper Wright Valley, one of the McMurdo Dry Val… [+8436 chars]