10 newly discovered scientific mysteries (Part 1)

Thanks to the progress of modern science, people have gradually solved the big secrets around us that were previously listed as 'unresolved'.

Secret 1: Sound engineering in theater Epidaurus

Ancient theater Epidaurus.Photo: listverse

The ancient theater Epidaurus, located near Athens, Greece, was built in the late fourth century BC as one of the best preserved theaters to date. Since ancient times, people have considered it a great sound wonder. The entire audience of up to 15,000 can hear every word of the actors clearly without the need for amplification.

In order to demonstrate the theater's marvelous sound technique, tour guides often group travelers each seated in an optional spot and he stands on a small stage to explain to people how to feel for themselves. How wonderful is the sound transmission in this project.

For many centuries, scientists have debated to find ways to explain but have not explained any convincing. One of the theories is that light breezes blowing around the theater brought sound to each seat. In 2007 researchers at the Georgia Institute of Technology discovered that the limestone materials in the seats created a filtering effect, compressing low-frequency sounds, thereby reducing the noise of the crowds to a minimum, so the seats act like natural sound traps.

However, it is not known whether such great sound techniques are the result of a random or a product of a progressive architectural method.

Notable event: The stage for the symphony orchestra (or dance) has an extremely perfect round shape, with a diameter of 19m50. A well circular background intact at the center is probably the altar of the Greek Wine of God.

Secret 2: Crystal skulls

A crystal skull.Photo: listverse

Almost everyone knows crystal skulls in the movie of Indiana Jones and Crystal Kingdoms. However, there are now a lot of serious, rare and expensive crystal skull collectors because they believe they are ancient products of Aztec or Maya civilization, before Colombus found out. Americas. In 2008, a team of American and British researchers used X-ray crystallography and electron microscopy to examine the crystal skulls on display at the British Museum and the Smithsonian Institution.

The detailed analysis of the surface of the skulls showed that scratches were sharpened by extremely small rotations around the eye bags, teeth and skull. It is clear evidence that the skulls were cut and polished with a wheel-turning device, while the Aztecs in history never knew how to use wheels.

The researchers concluded that those extraordinarily expensive skulls were cut from a Brazilian natural crystal base and crafted in Europe. They were then sold to collectors as an artifact of the ancient Aztec civilization. After this discovery, many museums removed crystal skulls from their exhibits because the question was clarified.

Notable event: Among the most famous skulls is the museum's museum collector Mitchell-Hedges. The skull was discovered by the adopted daughter of Mitchell-Hedges, a discovery explorer in 1924. Hedges announced that the crystal skull had at least 3,600 years ago. People believed it and never surveyed the details because the owner of the skull didn't give it a try.

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