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Remember to wipe cat poster
Our relationship with cats originated thousands of years ago. That’s when prehistoric peasants farmed, some feral cats might have found their way into their grain storage: Because there were rats there.
Mice destroy our crops, eat our food and sometimes bring disease. Cats come and catch them, and so people begin to think that they should have cats.
However, cats also know that they will benefit from clinging to people’s feet.
From their home of the Middle East, cats followed humans into boats, out to sea and took over the world. They eventually came to all six continents, even visiting Antarctica.
Domesticated and submissive humans must be a successful evolutionary strategy for cats.
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How do cats use humans to invade the world?
In a new study, scientists comprehensively examined the DNA of ancient cat bones and mummies that lived 9,000 years ago. They want to trace the process of invading the world of cats.
The entire study, from conception to completion and publication, took about 10 years, not too surprised by the work required to search for the remains of ancient cats.
“Cat bones are very rare,” said Eva-Maria Geigl, a paleontologist from the Jacques Monod Research Institute, one of the study’s authors. Ancient people did not raise cats for meat, so their bones were not as common as pork bones or chicken bones.
Geigl and her colleagues tried to write letters to persuade museums and collectors to get samples from the remains of cats found during archaeological excavations. Finally, the team collected bones, teeth and even feathers from 352 cats, including the Egyptian cat mummy displayed inside the British Museum.
But not everything that remains contains DNA. The Middle East is a harsh hot environment. In ancient Egyptian catacombs, where mummies of kings and even cats, water and humid air were stored, they also destroyed DNA.
It was a disaster for researchers, Geigl said. Existing DNA sequences are also very fragile. The technician’s own extraction process can also damage the DNA.
Therefore, in order to protect cats’ precious DNA from the heat of bone and teeth grinding, that process must be done inside a tank of liquid nitrogen. Inevitable loss, in the end, the team only got the DNA of 209 cats.
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