نتایج جستجو برای: mastodon
تعداد نتایج: 86 فیلتر نتایج به سال:
Fossilized bones from extinct taxa harbor the potential for obtaining protein or DNA sequences that could reveal evolutionary links to extant species. We used mass spectrometry to obtain protein sequences from bones of a 160,000- to 600,000-year-old extinct mastodon (Mammut americanum) and a 68-million-year-old dinosaur (Tyrannosaurus rex). The presence of T. rex sequences indicates that their ...
Recent evaluation of the use of Pleistocene megafauna by Clovis hunter-gatherers has suggested that a small number of reliable associations between Clovis artifacts and the remains of Proboscideans are documented, with perhaps as few as 14 occurrences currently known. Specifically, we ask whether 14 is a large or a small number of associations given the spatio-temporal dimensions of the Clovis ...
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