Radiocarbon dating of fossils taken from caves on islands along
Heaton and his colleagues have excavated more than 5,000 bags of sediment from On Your Knees Cave.
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Black bears, brown bears, caribou, hoary marmots, and brown lemmings died within or were dragged into On Your Knees Cave in the millennia preceding the last glacial maximum.
Bones dating from the time when the ice was most widespread represent arctic fox and their prey, ringed seals.
Radiocarbon dating of fossils taken from caves on islands along southeastern Alaska's coast suggest that at least a portion of the area remained icefree during the last ice age.
Some of the caves, including those on Prince of Wales Island, were natural traps into which the animals fell and couldn't escape, says Timothy H.