Footprints in the Sand: Discovery Rewrites Ancient American History
WHITE SANDS NATIONAL PARK, N.M. â Deep in the desert basin of southern New Mexico, a remarkable scientific discovery is rewriting the history of human migration. Researchers have confirmed that a collection of fossilized human footprints preserved in the dried mud of White Sands National Park dates back between 21,000 and 23,000 years. This astonishing find proves that ancient people lived in North America thousands of years earlier than most scientists previously believed possible.
For decades, history textbooks taught that the first humans arrived in the Americas roughly 13,000 to 16,000 years ago. Scientists believed these early travelers crossed an ancient land bridge connecting Asia to modern-day Alaska when ocean levels dropped. However, massive sheets of glacial ice were thought to have completely blocked travel farther south until those ice sheets melted. The newly dated footprints at White Sands shatter that timeline. They demonstrate that people were already thriving in the Southwest during the height of the Last Glacial Maximum, the coldest period of the last Ice Age.
- fossilized:
- Changed into stone or preserved in rock over a very long period of time.
- migration:
- The movement of people or animals from one place to another.
- radiocarbon dating:
- A scientific method used to find the age of ancient organic materials by measuring radioactive carbon.
- trackway:
- A continuous path or trail of footprints left by a person or animal.
- extinct:
- No longer living or existing anywhere on Earth.
- resilient:
- Able to withstand, survive, or recover quickly from difficult conditions.
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Main Idea
Identify the central idea and explain how important details develop it.
Context Clues
Use clues in the passage to work out what words mean. A separate printable Vocabulary worksheet is also available.
Summarize
Select, organize, and restate the most important information without adding opinion.
Purpose
Analyze what the author aims to do and how choices serve audience and purpose.
Structure
Analyze how sections and organizational choices build the text's ideas or effects.
Fact & Opinion
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Preview questions from this passageShowHide
- 1What is the main discovery described in the article, and where did it take place?
- 2How does the age of the White Sands footprints challenge what textbooks previously taught about human migration to the Americas?
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About this news article passage for Upper Elementary
âFootprints in the Sand: Discovery Rewrites Ancient American Historyâ is a news article reading passage about Ancient Footprints, written for Upper Elementary. It takes about 4 minutes to read (537 words) and comes with an interactive quiz and a printable worksheet with comprehension questions and an answer key.