3 Widely Known Scientific Facts That Were Disapproved In Recent Studies
Our world is constantly changing. In most cases, new technologies, discoveries, and research results help us keep up with these changes. And sometimes, we need to reconsider some facts that we once believed to be steadfast truths. So, here are three wide-known ideas that are no longer actual.
1. Slaves did not build Egyptian pyramids.
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Do you still think that Egyptian pharaohs forced their slaves to build these impressive pyramids of Giza? However, it's not how the things were, according to the latest findings.
In 2010, a group of archaeologists discovered tombs of people who build the pyramids of Giza. The tombs were located near to the king's pyramid. According to Zahi Hawass, who led the excavation team, it allows us to suggest that these people were actually paid workers and not slaves. Plus, other evidence from the excavation site shows that the builders ate meat on a daily basis. Slaves just wouldn't be treated that way.
2. Diamond is not the hardest substance.
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For a long time, diamond was believed to be the hardest substance known. But according to the Scientific American, there are at least two other materials that appear to be even harder.
Back in 2009, a group of physicists from the U.S. and China performed a study. They tested the indentation resistance of the two lesser known substances: lonsdaleite and wurtzite boron nitride.
The results of their experiments show that diamond's hardness is 18% less than the one of wurtzite boron nitride. The second substance, lonsdaleite, was proved to have 58% more indentation strength than the famous crystal.
Although, it is noteworthy that the scientists only measured the firmness of both materials. And in contrast to diamond, these substances are quite unstable in nature.
3. Pluto is no longer a planet.
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For a few decades, elementary school kids were taught that our solar system consists of nine planets. Pluto, which was discovered back in 1930, was considered to be the last one in the system. However, in 2003, an astronomer discovered that there was a larger object beyond Pluto. The discovery made the scientists wonder whether there are certain parameters for classifying an object as an actual planet. And then, they concluded that Pluto was both too small and too far away to be named one. So, it was demoted to a status of a dwarf planet. The other object, which was named Eris, didn't make the cut either.
The knowledge keeps evolving every day. So, every new discovery may turn our view of life upside down. Meanwhile, you can share these three intriguing facts with your friends; so, they would also be up to date.
Source: Business Insider