They survived the disaster that eliminated dinosaurs, but staying was declining until the invention of the city, which sent their numbers.
The genetic analysis of a group of bed bugs showed that its history was linked to the human story, as parasites that absorb blood spread and spread with humans in large settlements.
Dr. Warren Booth, the urban insect scientist in Virginia Tech, said that the intimate relationship between the host and the parasite has fueled a significant increase in the beds of the bed soon from the first cities, which made the competition for the first real urban insects.
“When we started to live in cities, we gathered all these people together, and they had all their stay with them,” said Bath. “After that, with the spread of civilization all over the world, insects spread with them to the extent that they are now everywhere in human society.”
Scientists compared the DNA to 19 bugs from the Czech Republic. Nine “with humans” was associated with the rest of the bats. The analysis found that the ancestral residents behind both groups were declining about 45,000 years ago, as the land was cooled in the last icy period.
However, while the population estimated at bed doors associated with bats continued to decline to this day, the number of ponds related to humans was settled about 12,000 years ago before a “dramatic” rise about 8,000 years ago, and researchers, and researchers Write in biology messages.
The first cities of the world originated from the settlements that were built after humans turned from a Bedouin life to a one dominated by agriculture. The age of çatalhöyük, on the modern day, is about 9000 years old and was home to thousands of people. About 5,000 years ago, Uruk in ancient Mesopotamia had 60,000.
Bug It evolved more than 100 meters ago It feeds on the blood of an unknown host before the bats and the first humans. “We know that the evolutionary history of humans and bed doors have been linked for a long time,” said Professor Michael Seifa Ghothei, an insect scientist at Sheffield University.
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SIVA-Jothy has warned about the new study claims, coming from a small number of bugs in one country, and wondering whether other common parasites may deserve competing for the title of the first urban pests. Head lice grew up more than a million years ago, for example, and made humans scratch since then.
