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Science likes to travel far in search of new phenomena, but nature keeps reminding us that, really, we’ve yet to discover many things much closer to us. That was a clear lesson for researchers who dug up the oldest ice on record—an ancient piece of Earth’s geological history from roughly 6 million years ago.
For a paper published on October 28 in Proceedings of the National Academy of Sciences, the Center for Oldest Ice Exploration, or COLDEX, describes the enigmatic composition of a…
