Air hydrates are frequently observed in polar ice samples.
The ice samples now in hand may be able to answer many mysteries, including disputes about volcanic eruptions.
French scientists who analyzed the deepest ice samples said they were as old as 420,000 years.
The essence of his work involves retrieving deep ice samples, or cores, from glaciers.
What's more, the ice samples suggest this is a natural process.
The Greenland studies are based on ice samples extracted by a consortium of scientists from eight European nations.
For the lake to be opened for use, ice samples must reach a thickness of at least 16 cm.
They said the first ice sample apparently had been distorted when the bottom of the flowing glacier from which it was taken passed over uneven ground.
Many taxa are likely still undiscovered due to the methodological problems in analyzing ice samples.
Forty years ago, when I took ice samples at the Antarctic research station, we were as yet unaware of that fact.