Early man in America takes a step backward — Science News, January 27, 1973
“Early Americans lived among and hunted mammoth, camel, extinct horse and bison as far back as 15,000 years. Now there is mounting evidence for a second breakthrough that will push the history of man in America back to 30,000 years — and possibly further.”
Update
The question of when humans first set foot in the Americas is still hotly debated. Recent fossil and archaeological evidence suggests the first inhabitants arrived tens of thousands of years ago. For instance, humanlike footprints in New Mexico date to about 20,000 years ago (SN: 11/6/21, p. 12).
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