About Those Mysterious Big Holes...

...in Siberia, here's an article about them:

Odd Cause of Gaping Siberian Holes Possibly Found

The article contains a little "oops"in the fourteenth paragraph, namely:

"This part of Siberia contains deep gas fields, and it also contains a lot of small lakes, which formed between 4,000 and 10,000 years ago when the climate was warmer, Romanovsky said. Perhaps these odd holes developed in the same way that sinkholes did, but later expanded."

What's that you say? The climate was "warmer" 4,000 to 10,000 years ago!?!?!?!?!?