Science & Technology
Thu, 09 Mar 2017 04:32 UTC
Astronomers have catalogued just 20 or so of these brief, superbright flashes, which are known as fast radio bursts (FRBs), since the first one was detected in 2007. FRBs seem to be coming from galaxies billions of light-years away, but what's causing them remains a mystery.
"Fast radio bursts are exceedingly bright given their short duration and origin at great distances, and we haven't identified a possible natural source with any confidence," study co-author Avi Loeb, a theorist at the Harvard-Smithsonian Center for Astrophysics, said in a statement Thursday (March 9). "An artificial origin is worth contemplating and checking." [5 Bold Claims of Alien Life]
One potential artificial origin, according to the new study, might be a gigantic radio transmitter built by intelligent aliens. So Loeb and lead author Manasvi Lingam, of Harvard University, investigated the feasibility of this possible explanation.
adorable in sweaters, possess fairly sophisticated cognitive abilities. They recognize emotion, for example, and respond negatively to antisocial behavior between humans. Man's best friend can also get pretty tricksy when it comes to scoring snacks. As Brian Owens reports for New Scientist, a recent study found that dogs are capable of using deceptive tactics to get their favorite treats.
Fri, 10 Mar 2017 23:45 UTC
Humpbacks aren't normally considered to be terribly social. They are mostly found alone, in pairs, or sometimes in small groups that disband quickly.
But research crews have spotted strange new social behaviour on three separate cruises in 2011, 2014 and 2015, as well as a handful of public observations from aircraft.
These super-groups of up to 200 were spotted feeding intensively off the south-western coast of South Africa, thousands of kilometres further north from their typical feeding grounds in the polar waters of the Antarctic.
"It's quite unusual to see them in such large groups," says Gísli Vikingsson, head of whale research at the Marine and Freshwater Research Institute in Iceland.
Fri, 24 Feb 2017 19:39 UTC
After the 2003 completion of the Human Genome Project -- which sequenced all 3 billion "letters", or base pairs, in the human genome -- many thought that our DNA would become an open book. But a perplexing problem quickly emerged: although scientists could transcribe the book, they could only interpret a small percentage of it.
Biologists have suspected for years that some kind of epigenetic inheritance occurs at the cellular level. The different kinds of cells in our bodies provide an example. Skin cells and brain cells have different forms and functions, despite having exactly the same DNA.
As part of a major ongoing effort to fully map and annotate the functional sequences of the human genome, including this silent majority, the National Institutes of Health (NIH) announced new grant funding for a nationwide project to set up five "characterization centers," including two at UC San Francisco, to study how these regulatory elements influence gene expression and, consequently, cell behavior.
Thu, 09 Mar 2017 22:23 UTC
For such a devastating earthquake to take place, it would have to be the result of a rupture, not only the Newport-Inglewood fault in Orange and Los Angeles counties, but also in San Diego's Rose Canyon fault system, which has not moved since around the mid-1650s.
The study, published in the Journal of Geophysical Research, concluded that
"an end-to-end rupture of the offshore portion of the (Newport-Inglewood/ Rose Canyon) fault zone could, depending on rupture characteristics, produce a M 7.3 earthquake, or a M 7.4 event if a northern onshore segment is included. If rupture were to occur on the southern onshore portion of the fault as well, the magnitude would be even greater."US Geological Survey's Valerie Sahakian, lead author of the study, told the Los Angeles Times, "These two fault zones are actually one continuous fault zone."
Previously, scientists have reported that there could be as much as a three-mile gap between the faults, but the new study posits that the faults are only separated by a distance of one and a quarter miles. Sahakian said, "That kind of characterizes it as one continuous fault zone, as opposed to two different, distinct fault systems," explaining that this characteristic makes it easier for an earthquake to spread, as its seismic reach widens.
Some seismologists have suggested that the two faults may be one over the last 30 years, but proving the theory requires finding the gap's underwater location. Now, researchers from UC San Diego's Scripps Institution of Oceanography, including Sahakian, spent 100 days aboard boats collecting data in 2013.
They generated data using a machine that sends acoustic waves to the sea floor. The information sent back helped researchers locate the faults and produce a more accurate map.
Egill Hauksson, a seismologist at Caltech not involved with the study said that the location of the faults, near the shoreline and with extremely watery soil, is a cause for concern. He explained, "you would see a lot of liquefaction in the coastal areas, which means there will be a lot of damage to all kinds of coastal structures or piers." The most-impacted areas in such a temblor would have to seek assistance from places as far away as Santa Barbara and the Inland Empire.
Sahakian advised, "Make sure your bookshelves are bolted to the wall. Always be prepared for a large earthquake."
Fri, 10 Mar 2017 17:05 UTC
The technique is being refined by NASA experts from the agency's Jet Propulsion Laboratory in Pasadena, California, and involves an extremely powerful antenna shooting high frequency radio waves into space.
NASA reported how it used the 70-meter antenna at the Goldstone Deep Space Communications complex in the Mojave Desert to detect India's Chandrayaan-1, which lost contact with earth almost a decade ago.
Sun, 27 Oct 2013 00:00 UTC
"Suddenly, it's as if the processing power of the brain is much greater than we had originally thought," said Spencer Smith, PhD, an assistant professor in the UNC School of Medicine.
His team's findings, published October 27 in the journal Nature, could change the way scientists think about long-standing scientific models of how neural circuitry functions in the brain, while also helping researchers better understand neurological disorders.
"Imagine you're reverse engineering a piece of alien technology, and what you thought was simple wiring turns out to be transistors that compute information," Smith said. "That's what this finding is like. The implications are exciting to think about."
Fri, 10 Mar 2017 15:39 UTC
The brief announcement on Friday made on state broadcaster CCTV's military and agricultural affairs channel said the J-20 had entered service in the People's Liberation Army Air Force (PLAAF). The report did not provide further details.
The announcement did not come as a big surprise; in November, the Chinese military demonstrated two J-20s during a pre-announced brief fly-past at the Zhuhai Air Show in Guangdong province, signaling that the aircraft was about to enter service.
Fri, 10 Mar 2017 15:22 UTC
Cassini scientist Carolyn Porco took to Twitter to share some of the extraordinary new images snapped by the spacecraft. She also revealed some of the comparisons people were making about the tiny moon, which has a diameter of just 17 miles (28km).
"After 13 years, we've come to expect extreme reactions to our images. But hunger? Ravioli, tortellini, empanada, pierogi, hamburger, brie?" Porco said.
Fri, 10 Mar 2017 07:15 UTC
Flippy has mastered the art of cooking the perfect burger and has just started work at CaliBurger, a fast-food chain.
The robotic kitchen assistant, which its makers say can be installed in just five minutes, is the brainchild of Miso Robotics.
"Much like self-driving vehicles, our system continuously learns from its experiences to improve over time," said David Zito, chief executive officer of Miso Robotics.