Page 128 - பல்கலைக்கழகம் ஆஃப் புதியது தெற்கு வேல்ஸ் News Today : Breaking News, Live Updates & Top Stories | Vimarsana
Covid-19 news: UK to give third doses in world s largest booster trial
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Covid-19 news: Long covid may improve after vaccine, survey finds
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NCPA May 18, 2021
Life may be turning into a Hitchcock film. According to scientists at the University of New South Wales in Australia, the world belongs to the birds, and they are kind enough to let us live here. The newly released research shows that there are almost 10,000 species of birds, the most common being the house sparrow, European starling, the ring-billed gull, and the barn swallow – each with a population of more than a billion. In total, there are about 50 billion individual birds in the world, meaning that our feathered friends outnumber humans about 7-1. (I blame all this on Tippi Hedren.)
Study: Ovarian Cancer Screening Does Not Cut Deaths By Pam Harrison
May 18, 2021 Results from a huge British trial that involved more than 200,000 women show that annual screening for ovarian cancer did not reduce the death toll from this aggressive cancer. We are disappointed, as this is not the outcome we and everyone involved in the trial had hoped and worked for over so many years, said Usha Menon, MD, of the Institute of Clinical Trials and Methodology in London, and the study’s lead investigator.
The trial is the first “to show that screening can definitely detect ovarian cancer earlier. However, this very large, rigorous trial shows clearly that screening using either of the approaches we tested did not save lives, she said in a statement.
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Genes are encoded in DNA, and closely related species will often have the same genes in the same order in the genome. However, over millions of years of evolution, this shared gene order gets lost as the DNA gets broken, repaired and reshuffled.
More rarely, the gene order is “conserved” ¬- retained even between distant evolutionary relatives – if the genes encode for proteins that cooperate closely.
Previously, the oldest known cases of conserved gene order traced back to the Last Universal Common Ancestor of life, known as LUCA. LUCA was a population of cells billions of years ago that was ancestral to all cellular life. Its existence is inferred from genes that are shared across all major branches of the tree of life.
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