Prehistoric humans may have arrived the Americas earlier than previously thought: study

The video discusses the discovery of early settlers in Chiquihuite Cave, Central Mexico, dating back 33,000 years. This suggests that the first settlers crossed from Siberia to Alaska earlier than previously thought. Researchers found stone tools and used radiocarbon dating to confirm their age. The tools were made from limestone, a harder material than jasper, which was used by the Clovis culture. The video also explores new theories on migration routes, suggesting settlers traveled down the West Pacific Coast instead of through Canada due to limited resources.

What significant discovery was made in Chiquihuite Cave, Central Mexico?

• Fossils of extinct animals

• Evidence of human presence 33,000 years ago

• Remains of a large settlement

• Ancient cave paintings

What does the radiocarbon dating of materials in Chiquihuite Cave suggest?

• The site was a burial ground

• The cave was used for religious rituals

• The artifacts are between 31,000 to 33,000 years old

• The tools were made 10,000 years ago

Why are the limestone pieces found in the cave considered significant?

• They are naturally formed rocks

• They were used for building structures

• They are evidence of advanced toolmaking

• They are likely crude tools made by early settlers

What material did the Clovis culture use for toolmaking?

• Limestone

• Obsidian

• Granite

• Jasper

According to the new theory, how did the first settlers of the Americas likely travel?

• Via the Bering Strait

• Down the West Pacific Coast

• Across the Atlantic Ocean

• Through inland Canada