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Unfinished Business: How do we end HIV?
Of the 40 million people living with HIV, nearly a quarter are not receiving life-saving treatment and new transmissions are not falling as fast as many experts hope. So how can the world meet the UN’s target of ending the…
Did this star eat its planets? A new study offers clues on 'chemical paradox' of a binary system
Astronomers have investigated a puzzling binary star system in which two stars that may have formed together now show dramatically different chemical compositions. The new study, uploaded to the arXiv preprint server on May 29, hints at the possibility that…
Asexual lizards, virgin births and clones—the all‑female species of the animal kingdom
It may sound too bizarre to be true, but the Amazon molly (Poecilia formosa), a fish that inhabits rivers, lakes, and swamps in Mexico and Texas, exists over much of its range in populations that are 100% female. In 1932,…
