Laden...
ScienceDaily: Fossils & Ruins News |
Here's how early humans evaded immunodeficiency viruses Posted: 22 Aug 2019 11:19 AM PDT The cryoEM structure of a simian immunodeficiency virus protein bound to primate proteins shows how a mutation in early humans allowed our ancestors to escape infection while monkeys and apes did not. SIV's Nef protein forms a solid link between two primate proteins, tetherin and AP-2, forcing the destruction of tetherin, which normally prevents new SIV virions from budding off. A mutation in human tetherin disrupted binding, thwarting SIV budding -- until HIV evolved a work-around. |
Genetic diversity couldn't save Darwin's finches Posted: 22 Aug 2019 09:48 AM PDT Researchers found that Charles Darwin's famous finches defy what has long been considered a key to evolutionary success: genetic diversity. The study of the finches of the Galapagos Islands could change the way conservation biologists think about species with naturally fragmented populations to understand their potential for extinction. |
Early life on Earth limited by enzyme Posted: 22 Aug 2019 08:34 AM PDT A single enzyme found in early single-cell life forms could explain why oxygen levels in the atmosphere remained low for two billion years during the Proterozoic eon, preventing life colonizing land. |
New light on contested identity of medieval skeleton found at Prague Castle Posted: 22 Aug 2019 07:14 AM PDT Used as a propaganda tool by the Nazis and Soviets during the Second World War and Cold War, the remains of a 10th century male, unearthed beneath Prague Castle in 1928, have been the subject of continued debate and archaeological manipulation. |
Switching on the Atlantic Ocean heat pump Posted: 22 Aug 2019 05:11 AM PDT 34 million years ago the warm 'greenhouse climate' of the dinosaur age ended and the colder 'icehouse climate' of today commenced. Antarctica glaciated first and geological data imply that the Atlantic meridional overturning circulation, the global ocean conveyor belt of heat and nutrients that today helps keep Europe warm, also started at this time. Why exactly, has remained a mystery. |
Tiny ear bones help archaeologists piece together the past Posted: 21 Aug 2019 05:22 AM PDT For the first time archaeologists have used the small bones found in the ear to look at the health of women and children from 160 years ago. |
You are subscribed to email updates from Fossils & Ruins News -- ScienceDaily. To stop receiving these emails, you may unsubscribe now. | Email delivery powered by Google |
Google, 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States |
Laden...
Laden...