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And you may have like one day, one single day of class in Alaska in the summer. But what matters here is the summer season where the warm temperatures tend to go into the autumn and even the spring. And there's a researcher, lead researcher in this study, Tristan Carroll, and his colleagues. They were collecting some samples from the permafrost research tunnel near Fairbank. And the tunnel is about 50 feet, 15 meters below ground and extends around 250 feet, 170 meters into the permafrost. And it gives them a glimpse into life during the late the fusicine, at least 129,000, 11,700 years ago.