[strange news from all over the world] as the saying goes: the world is so big that there are no surprises. Parrots can learn their tongue, cute cats can act coquettishly, but have you ever seen stones that can 'sing'? According to the report on February 27 of "odditycentral. Com", an American Adventure website, people found a pile of pebbles with different shapes in the 'pebble Park' in Pennsylvania. Of course, this is not a common stone, but they can 'sing'.
It is reported that the pebble Park covers a total area of 128 acres (about 518000 square meters), of which 7-8 acres (about 28000-32000 square meters) are pebbles. When people hit them with hammers or other stones, they will make a metallic jingle. Because it's incredible that the stone makes such a crisp sound, at first people questioned whether the sound they heard was made by the stone. In fact, this hollow metallic sound is made by pebbles.
It is reported that Richard Middleton farce, a geologist in Pennsylvania, made several experiments on this phenomenon in 1965. He found that when people hit pebbles, a single stone makes a sound that people can't hear. However, when many stones make a sound together, people will hear a metallic jingle. But even though Richard discovered how pebbles work, he couldn't explain why they were so special.
Later, scientists found that the pebbles are composed of volcanic eruption diabase, which contains iron and some hard ore. It can be inferred that these components may make pebbles so strange, but scientists always believe that they are unique because of the pressure between the pebbles.
Of course, it's not entirely because of the ability to 'sing' that makes the cobblestone area stand out. It is speculated that these pebbles may also be the stones deposited during the avalanche, but this view seems to be unable to stand, because the stones after the avalanche should be on the top of the mountain rather than on the ground. There has always been a saying in this pebble area: in ancient times, there was no vegetation and insects in this area, and the surrounding area was also non-magnetic, so people speculated that, in the final analysis, the existence of these strange pebbles might be a masterpiece of nature.
Maybe we don't need to study the scientific significance behind these rocks because we admire them. What we need to do is to enjoy them.