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The American “cheetah” wasn’t a cheetah at all
6+ day, 4+ hour ago (109+ words) The extinct “American cheetah” was not really a cheetah at all, but a puma relative with an unexpectedly flexible lifestyle. Fossils from the Yukon suggest northern populations survived partly by eating fish, possibly including salmon, while southern cats hunted on…...
1.4-million-year-old footprints reveal a surprisingly large human relative
2+ week, 1+ day ago (819+ words) A remarkable set of fossil footprints from northern Kenya is offering scientists a rare glimpse of how an extinct human relative may have moved and interacted about 1.4 million years ago. The tracks, preserved near an ancient lakeshore, appear to record…...
A lost mega-cliff may explain the Grand Canyon’s missing billion years
3+ week, 3+ day ago (378+ words) A colossal cliff system created as the supercontinent Rodinia broke apart may have exposed the heart of the Grand Canyon nearly a billion years before the Colorado River carved it. The ancient landscape could also help explain why enormous sections…...