27 março 2020
Sardinians Were Stone-Age Stay-At-Homes
A new study suggests that Sardinians experienced less genetic turnover than populations living in mainland Europe. When large-scale migration is thought to have occurred during the Bronze Age in Europe, Sardinia’s population remained in place.
An international team of scientists analyzed the genomes of 70 Sardinians whose remains were recovered from more than 20 archaeological sites spanning a period of about 6,000 years. The scientists then compared the Sardinian DNA to DNA collected from other ancient and modern peoples. The researchers determined that Neolithic Sardinians were closely related to their contemporaries in mainland Europe. Sardinian genetic ancestry remained stable through 900 BCE, although a new style of stone towers did appear on the island in this century. The 900s BCE are important because that is when major population movements occurred in Europe. But they apparently did not impact Sardinia as much.
The DNA supported later population movement on the island, such as the arrival of the Phoenicians from what is now Lebanon, and the Punics, from what is now Tunisia, as early as 500 BCE During the Roman and medieval periods, the scientists also found evidence of migration to the island from Italy and Spain.
Hubble Hooks a One-Arm Galaxy
Located about 21 million light-years from our galaxy in the constellation Canes Venatici, NGC 4618 has a diameter of about one-third that of our Milky Way. Together with its neighbor, NGC 4625, it forms an interacting galaxy pair, which means that the two galaxies are close enough to influence each other gravitationally.
from NASA https://ift.tt/3bGuO2f
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