The United States is under 250 years old, but some of its maximum archaeological sites are older than Vikings sailors, the Roman empire and the pyramids.

Many assistance say how the first humans arrived here in North America. It is a mystery precisely how and when other people arrived, although it is widely believed that they crossed the Bering Strait at least 15,000 years.

Others are more recent and the other cultures stand out than throughout the country, with complex buildings and eliminating pictograms.

Many of those puts are open to the public, so you can see the old story of yourself.

Prehistoric camels, mammoths and other giant people have traveled, which is now new, when it is greener and more humid.

While the weather warmed about 11,000 years ago, Lake Otero Water fell, revealing the digital footprints of humans who lived among those extinct animals. Some even to stick to a vague, providing a rare review of the habit of the old hunters.

Recent studies place some of these fossilized digital footprints between 21,000 and 23,000 years. If the dates are correct, the prior impressions to other archaeological sites in the United States, raising interesting questions that those other people were and how they reached the state of the southwest.

While they can absorb white and homonymous sands, Pas’s footprints are prohibited lately.

In the 1970s, archaeologist James, Mr. Adovasio, caused controversy when he and his colleagues that the stone team and other artifacts discovered in southwest Pennsylvania belonged to humans who had lived in the region 16,000 years ago.

For decades, scientists have discovered evidence of human homes that seemed to have between 12,000 and 13,000 years, belonging to the Clovis culture. For a long time they would have been the first to cross the Bering land bridge. Humans who have arrived in North America before this organization are called before Clovis.

At that time, the skeptics said that evidence of appointments in the imperfect radiocarbon, AP News reported in 2016. During the years that followed, more places that seem greater than 13,000 years in the United States have been discovered.

Feder said that Advasio had meticulously looked for the site, but that there is still no transparent consensus on the age of the oldest artifacts. However, he said: “This site is surely a vital, vital and vital site. ” This helped archaeologists realize that humans began arriving in the continent against the people of Clovis.

The excavation itself is exhibited in the History Center of Heinz, which allows you to see a search in person.

These rod teams are other Clovis harassed projectiles, researchers wrote in a 2019 clinical magazine.

They also discovered a mastodon defense with what seemed to reduce the marks through a tool. Other scientists have returned to the site more recently, raising more bones and tools. They used a radiocarbon dating, which established the site as a pre-clavis.

Since it is underwater and personal property, it is not open to visitors.

The Federal Land Management Office owns the land where the caves are located, and are signed at the beginning of historical places.

Every time other people arrived at the Americas, Siberia crossed Beringia, an area of ​​land and sea between Russia and Canada and Alaska. It is now covered with water, however, once a land bridge that connects them.

Although Alaska can have a richness of archaeological evidence of the first Americans, it is also a difficult position to dig. “His excavation season is very close and expensive,” Feder said. Some require a helicopter to achieve, for example.

In 1929, James Ridgley, 1929, 1929, discovered gigantic bones with striated projectile problems near Clovis, in New Mexico. The other Clovis people who made these teams were named for this site.

The researchers who examine the site began to realize that the artifacts discovered on the site belonged to other cultures. Clovis’s problems are larger than Folsom flutes, which were first discovered in another archaeological site of New Mexico.

For decades after Whiteman’s discovery, the idea of ​​the mavens that the other people of Clovis were the first to cross the Bering d’Aring land bridge about 13,000 years ago. It is believed that the estimates of the arrival of humans are now at least 15,000 years ago.

Blackwater Draw Museum of the University of New Mexico in the East of New Mexico provides the archaeological site between April and October.

Based on the child’s genetic information, the researchers learned that he was connected to fashion asleans, but not directly. His non -unusual ancestors began to remarry genetically 25,000 years before dividing into two teams after a few thousand years: the ancient Berignians and the ancestors of the fashionable Americans.

According to this research, humans would possibly succeed in Alaska about 20,000 years ago.

Extending more than 80 feet long and five feet high, rows of curved poverty are wonderful when it shows from above. More than 3,000 years ago, the hunters-gatherers built them in tons of land. Scientists do not know precisely why other people have built them, whether ceremonial or a state demonstration.

It is a complicated walk to succeed in pictograms (and the NPS warns that it can be dangerously hot in summer) but it is seeing in person, Feder said. “These are artistic geniuses,” he said about artists.

Located in the Navajo nation, Celly Canyon has magnificent perspectives of the desert and thousands of years of human history. Centuries ago, the ancestral teams and Hopi have planted cultures, created pictograms and built cliff houses.

More than 900 years ago, the other town of Puebloan built the White House, which bears the name of the shadow of their clay. Its upper floors are sitting in a sandstone cliff, with a transparent fall of the windows.

The other people of Navajo, also known as Diné, still live in the Congo Canyon. Diné Alastair journalist Lee Bitsóí recently wrote about some of the sacred and taboo areas. They come with Tsé Yaa Kin, where archaeologists have discovered human remains.

In the 1860s, the United States government forced 8,000 Navajo to move to Fort Sumner in New Mexico. Fatal adventure is known as the “long walk. ” Finally, they were able to return, their houses and their cultures were destroyed.

A white walk is the one that is open to the public without a Navajo or NPS Ranger guide.

In early 1900, two shaped the Leling Association of Coliff Coliff, hoping to maintain the ruins in the state region of the Southwest. A few years later, President Theodore Roosevelt signed an invoice that designates the Green Mesa as the first national park aimed at “maintaining the works of man. “

The Mesa Verde National Park has a large number of homes, adding the Palais de Falaises. It has more than one hundred rooms and approximately two dozen kivas or ceremonial areas.

With the help of dendrocronology or trees dating, archaeologists learned when the ancestral people built some of those structures and that emigrated outside the doors of the region through the years 1300.

The population built posts of posts, which an archaeologist called “Woodhenges”, as a type of calendar. In the solstices, the sun rises or lies aligned with other mounds.

After a few hundred years, the population of Cahakia decreased and disappeared by 1350. Its largest mound remains, and the safe facets were rebuilt.

Presented in a limestone cliff in Camp Verde, Arizona, this is an apartment, not a castle, and is not connected to Sovereign Aztec Montezuma.

The other people of Sinagua have designed the construction of five stories and 20 rooms around 1100. It is curved to adhere to the herbal line of the cliff, which would have been more complicated than simply making a correct construction, Feder said.

The population was also practical, discovering irrigation systems and structure techniques, such as thick walls and shaded spots, to help them in the warm and dry climate.

Feder said that the accommodation is quite accessible, with a short walk along a path to see it, visitors cannot enter the construction itself.