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The Earth is incredibly ancient, with millions of years of history. While we have never witnessed dinosaurs firsthand, their existence is widely accepted. Numerous civilizations and various species that have now vanished once roamed our planet, and we possess evidence of their existence. This evidence often comes in the form of fossils.

Fossils are created when an organism's imprint is preserved under layers of rock for hundreds of years. During excavations, archaeologists sometimes uncover stones that bear these imprints. Although they may appear to be ordinary rocks, experts can identify fossils through their trained eyes. Additionally, there is a unique method they use for identification: licking.

The Secret Revealed by Saliva
To uncover secrets that are centuries old, experts conduct extensive excavations over several months. When they suspect they have found a valuable fossil, they employ this unusual technique. They lick the stone-like object. How does this reveal the truth? If it is merely a regular rock, the tongue glides easily over its surface. However, if it is a fossil, it will absorb the saliva, creating a sensation as if the stone is pulling the tongue in. This simple method allows experts to identify fossils with ease.

A Highly Effective Technique
During excavations, numerous samples are collected for testing, which can be quite costly. Therefore, experts aim to take only the most valuable items with them. Since rocks and fossils can look alike, they use the licking method on-site to ensure they do not mistakenly take back just stones. This technique has led to the discovery of many fossils that have opened new chapters in human history.