Sunday, August 6, 2017
Monday, July 31, 2017
Saturday, July 29, 2017
There is a story in the Bible that tells of God’s call for the annihilation of the Canaanites, a people who lived in the area that is now Jordan, Lebanon, Syria, Israel and the Palestinian territories thousands of years ago. “You shall not leave alive anything that breathes,” God said in the passage. “But you shall utterly destroy them.” But a genetic analysis has found that the ancient population survived that divine call for their extinction, and their descendants live in modern Lebanon. “We can see the present-day Lebanese can trace most of their ancestry to the Canaanites or a genetically equivalent population,” said Chris Tyler-Smith, a geneticist with the Wellcome Trust Sanger Institute who is an author of the paper. “They derive just over 90% of their ancestry from the Canaanites.” Tyler-Smith and an international team of geneticists and archaeologists recovered ancient DNA from bones belonging to five Canaanites retrieved from an excavation site in Sidon, Lebanon, that were 3,650 to 3,750 years old. The team then compared the ancient DNA with the genomes of 99 living people from Lebanon that the group had sequenced. It found that the modern Lebanese people shared about 93% of their ancestry with the Bronze Age Sidon samples. “The conclusion is clear,” said Iosif Lazaridis, a geneticist at Harvard who was not involved in the study. “Based on this study it turns out that people who lived in Lebanon almost 4,000 years ago were quite similar to people who lived there today, to the modern Lebanese.” Marc Haber, a postdoctoral fellow at the Wellcome Trust Sanger Institute in England and lead author on the study, said that compared with other Bronze Age civilizations, not much is known about the Canaanites. “We know about ancient Egyptians and ancient Greeks, but we know very little about the ancient Canaanites because their records didn’t survive,” he said. Their writings may have been kept on papyrus, which did not stand the test of time as clay did. What is known about the Canaanites is that they lived and traded along the eastern coast of the present-day Mediterranean, a region that was known as the Levant. “What we see is that since the Bronze Age, this ancestry, or the genetics of the people there, didn’t change much,” Haber said. “It changed a little, but it didn’t change much and that is what surprised me.” He said researchers thought that migrations, conquests and the intermixing of Eurasian people — like the Assyrians, Persians or Macedonians — with the Canaanites 3,800 to 2,200 years ago might have contributed to the slight genetic changes seen in modern Lebanese populations. Still, the Lebanese retain most of their ancestral DNA from the Canaanites.
African-Americans typically have worse outcomes from smoking-related cancers than whites. Scientists at Wake Forest Baptist Medical Center have found that African-Americans have an increased mutation rate in several genes, including the best known in tobacco-related tumors, TP53. "We know TP53 mutation happens in 55% of all cancer patients," said the study's lead author, Wei Zhang, Ph.D., Hanes and Willis Family Professor in Cancer at Wake Forest School of Medicine, part of Wake Forest Baptist. "In our study, we found that the African-American population had close to a 70% mutation rate. This data suggests that increases in TP53 mutation in African-Americans may be responsible for the observed resistance to chemotherapy and a poorer prognosis overall." The scientists found a significantly increased mutation rate in the TP53 gene in the African-American groups studied. The researchers also found that a number of genes - including those that repair DNA damage and remodel chromatin - mutated at higher frequencies in the African-American cancer patients.
Thursday, July 27, 2017
Barbaric Muslims: Some 20 people from Multan, Pakistan, have been arrested for ordering the rape of a teenage girl, in revenge for a rape her brother allegedly committed
Police said that the families of the two girls are related. Members of both had joined forces to decide what should be done. "A jirga [village council] had ordered the rape of a 16-year-old girl as punishment, as her brother had raped a 12-year-old," police official Allah Baksh said. He said that the village council was approached recently by a man who said that his 12-year-old sister had been raped by their cousin. The council then ordered the complainant to rape the sister of the accused in return - which police say he did. The girl was forced to appear before the group and raped in front of them and her parents. The mothers of the two girls later filed complaints at the local police station. Medical examinations have confirmed rape in both cases. Another officer, Ahsan Younas, said that the first girl to be raped was aged between 12 and 14. The victim of the revenge rape is said to be 16 or 17. He said that police had registered a complaint against 25 people, and that the suspect accused of raping the 12-year-old was still at large.