Huge Magnetic 'Ropes' Drive Powerful Sun Explosions
Known as magnetic flux ropes, coronal loops and solar prominences, these structures possess spiraling magnetic field lines, as if a huge bar magnet had been twisted into a corkscrew. Scientists have long thought magnetic flux ropes drive powerful solar explosions such as coronal mass ejections (CMEs), which can spawn geomagnetic storms that damage satellites in space and disrupt power grids on Earth. Two models for how magnetic flux ropes are involved have emerged. In the first model, a magnetic flux rope exists before the eruption.
Cosmonauts Breeze Through Speedy Spacewalk at Space Station
Two Russian cosmonauts breezed through a spacewalk outside the International Space Station Wednesday (Oct. 22) on a mission to collect old experiments and inspect their orbital home. Clad in bulky Orlan spacesuits, cosmonauts Max Suraev and Alexander Samokutyaev planned to spend about six hours performing maintenance on the station, work that included tossing obsolete gear out into space. The instrument, which was installed on the Russian Zvezda service module in 2011, was no longer in operation, and the cosmonauts jettisoned the device toward the rear of the space station.
Cosmonauts breeze through spacewalk outside space station
By Irene Klotz (Reuters) - Two Russian cosmonauts wrapped up a speedy, 3 -1/2-hour spacewalk outside the International Space Station on Wednesday to replace science experiments and jettison two unneeded antennas. Station commander Maxim Suraev and flight engineer Alexander Samokutyaev quickly completed the first task on their to-do list, removing and jettisoning a defunct science experiment known as Radiometriya. The device, which was installed in 2011, was used to track seismic activity on earth, NASA mission commentator Rob Navias said during a live broadcast of the spacewalk on NASA TV. ...
Wacky Humpbacked Dinosaur Looked Like 'Star Wars' Creature
About 70 million years ago, a humpbacked, duck-billed dinosaur with monstrous front limbs and "mudding hooves" tramped through rivers hunting fish. Though the odd-looking creature, named Deinocheirus mirificus, was discovered nearly 50 years ago, almost nothing was known about the mysterious creature until two new skeletons were unearthed in Mongolia recently. "Deinocheirus was a peculiar humpbacked form with a duckbill-like skull," that could grow to the size of a T. rex, said study lead author Yuong-Nam Lee, a researcher at the Korea Institute of Geoscience and Mineral Resources in South Korea. In 1965, paleontologists unearthed the giant, 7.8-foot-long (2.4 meters) forelimbs of a terrifying dinosaur in Mongolia's Gobi Desert.
The beast with the behemoth arms: A dinosaur mystery is solved
By Will Dunham WASHINGTON (Reuters) - In July 1965, two gigantic fossilized dinosaur arms replete with menacing claws were unearthed in the remote southern Gobi desert of Mongolia. Measuring 8 feet (2.4 meters), they were the longest arms of any known bipedal creature in Earth's history. But nearly everything else was missing, leaving experts baffled about the nature of this beast with the behemoth arms. Half a century later, the mystery has been solved. ...
Neanderthals and Humans First Mated 50,000 Years Ago, DNA Reveals
The DNA from the 45,000-year-old bone of a man from Siberia is helping to pinpoint when modern humans and Neanderthals first interbred, researchers say. Although modern humans are the only surviving human lineage, others once lived on Earth. The closest extinct relatives of modern humans were the Neanderthals, who lived in Europe and Asia until they went extinct about 40,000 years ago. Recent findings revealed that Neanderthals interbred with ancestors of modern humans when modern humans began spreading out of Africa — 1.5 to 2.1 percent of the DNA of anyone living outside Africa today is Neanderthal in origin.
Daily Ebola Checks: Everyone Arriving from West Africa Will Now Be Monitored
All passengers arriving in the United States from the West African countries where the Ebola outbreak is ongoing will now be monitored for 21 days, officials at the Centers for Disease Control and Prevention said today. "Today, we are beginning a new system that will further protect Americans from Ebola," CDC Director Dr. Tom Frieden said at a news conference Wednesday (Oct. 22). This "active post-arrival monitoring" will begin on Monday, Oct. 27 and will include journalists and health care workers returning from the region, as well as CDC staff, Frieden said. The monitoring will add an additional level of safety to other measures already in place to prevent the spread of the virus, Frieden said.
Hawaii scientists return to ocean for weapon study
University of Hawaii scientists plan to embark on a final expedition to deep waters off Oahu to study how chemical weapons dumped in the ocean decades ago are affecting seawater, marine life and sediment. ...
Greek archaeologists unearth head of sphinx in Macedonian tomb
ATHENS (Reuters) - Archaeologists unearthed the missing head of one of the two sphinxes found guarding the entrance of an ancient tomb in Greece's northeast, as the diggers made their way into the monument's inner chambers, the culture ministry said on Tuesday. The tomb on the Amphipolis site, about 100 km (65 miles) from Greece's second-biggest city Thessaloniki, has been hailed by archaeologists as a major discovery from the era of Alexander the Great. They say it appears to be the largest ancient tomb to have been discovered in Greece. ...
23andMe, MyHeritage partner to combine DNA and family trees
TEL AVIV (Reuters) - Personal genetics company 23andMe and Israel's MyHeritage said on Tuesday they would collaborate to enable people to discover their heritage based on genetic ancestry and documented family history. California-based 23andMe, which is backed by Google, is a pioneer in the sale of home genetic tests and has more than 750,000 clients. It sells a $99 DNA test, from which it provides its customers ancestry-related genetic reports. MyHeritage helps families find their history with family tree tools and a library of more than 5.5 billion historical records. ...