Discovered 8,000-year-old ancient gum

New Zealand anthropologists have discovered evidence that ancient people used a natural "gum" to make hunting glue.

The birch bark in Sweden is an important material used by ancient people to create a special glue through chewing sugar like modern chewing gum.

Researchers have discovered "ancient gum".

This special glue is called "ancient chewing gum" by researchers, because it can store ancient people's teeth marks and DNA traces for thousands of years.

Ancient people living in Scandinavia were the first to know how to use special glue.

According to the analysis from the collected specimen, anthropologists identify those who make glue from birch bark including men and women. There may be children who are only 5 years old.

Lisa Matisoo-Smith, a molecular anthropologist at the University of Otago in Dunedin, New Zealand, said: "It's possible to get DNA from something that people chewed thousands of years ago."

Earlier, in the late 1980s, a group of Swedish houses unearthed a hole in an archaeological site called Huswise Klev in western Sweden.

Here, they discovered more than 100 black lumps of coal, the size of fingers, marked with different teeth marks. Chemical analysis reveals that these are binders derived from plant plastics.

The researchers identified the ancient tool makers that heated the birch resin distillation with a flame to soften it, chewing its fragments into a plastic state, then using them as pieces. Stick the grinding stone to the wood or bone shaft to make weapons and tools.