Invented in modern times but it killed people 5,000 years ago

Why is the invention thought to be of modern times, which appeared thousands of years ago?

Turning plastic into a water bottle is a pretty handy invention for humans, despite the risk of health damage from certain plastics.

Plastic bottle idea is an invention only in modern society.

But do you think plastic bottles are the invention of modern society? In fact, people have used plastic bottles much longer than we thought, and the exact number is 5,000 years, by ancient American Indians.

Specifically, according to a study by the Smithsonian Institute of the National Museum of History (USA), Indians used to use . asphalt to make water bottles. They were made from oil that washed ashore, mostly tarry on the sand.

Evidence shows that Indians have melted asphalt, put them into molds to form different objects, including plastic bottles. They store water in it in case of dry weather. In addition, asphalt is also used to repair weapons and create signal smoke for the whole tribe.

Plastic bottles are reconstructed by researchers.

However, according to experts, the melting of asphalt will release a toxic substance called polycyclic aromatic hydrocarbons (PAHs). Today, PAHs have been shown to be involved in many dangerous diseases - notably cancer, hormonal disorders, organ damage .

In modern society, the human body comes into contact with this substance through smoke and traffic emissions. But for Aboriginal people who use tar to store water, the levels of PAH entering the body will be extremely scary.

It is known that the ethnic group using these plastic bottles is Chumash , living on the islands off Los Angeles. The remains of their bones show that their health began to turn bad from 5,000 years ago, while settling here for at least 8,000 years - that is more than enough to adapt to all environmental changes.

The people who use these plastic bottles are Chumash, living on islands off Los Angeles.

According to experts, the bone quality of the bones is very poor, the skull is small, the teeth are weak. And what caused that tragedy could be the asphalt bottles.

"This seems to be the first time we have to assess PAH concentrations in ancient populations," said Dr. Sabrina Sholts, research director. "We believe this study will raise the understanding of the impact of chemicals by human technology on evolution."

There will be more research on this issue. But according to Sabrina, it seems that Native Americans have experienced a period of nightmares, when they did not even know what had caused their tribe to perish.