Science & Technology
Sun, 19 Mar 2017 12:53 UTC
On March 16, Lockheed Martin said that its new solid-state fiber laser can slice through targets with a record-breaking 58 kilowatts of direct power, and that in a matter of months it will deliver its High Energy Laser Mobile Test Truck (HELMTT) to the US Army for testing.
Sun, 19 Mar 2017 12:26 UTC
Mexico's National Museum of Anthropology (INAH) say the bones of the prehistoric mammoth were discovered by chance in December 2015, during construction work near the town of Tultepec, approximately 40km north of Mexico City.
Since the discovery, archaeologists have been painstakingly preserving the fossilized bones. Crucially, the mammoth was found cut up into pieces, which may indicate that prehistoric humans lived in Mexico 14,000 years ago.
Sat, 18 Mar 2017 07:13 UTC
But the hypothesis of the neutron star was not a predictive theory that was composed and then verified through observation — rather, it was invented in the 1960's, after the completely unexpected discovery of radio pulses from the constellation Vulpecula. Today, we report on the latest in a string of "baffling" discoveries that in effect falsify the neutron star hypothesis, and we explore theoretical alternatives in the Electric Universe and plasma cosmology.
Wed, 15 Feb 2017 19:47 UTC
As microbes gain scientific stature, some scientists are trying to answer questions about how and when those germs first show up on babies. Birth itself may be an important microbe-delivery event, some researchers suspect. A trip through the birth canal can coat a baby with bacteria from his mother. A C-section, some evidence suggests, might introduce different bacteria, at least right after birth.
Sat, 18 Mar 2017 18:56 UTC
Uzboi Vallis is situated in the Margaritifer Sinus quadrangle (MC-19) region on Mars, believed to have been formed by water that once existed on the planet.
The dramatic layers of rust-hued rock likely formed when the valley's drainage was blocked by a large impact that hollowed out the planet's Holden Crater.
Researchers using NASA's Mars Reconnaissance Orbiter (MRO) report the first detection of cumulative growth, from one Martian spring to another, of channels resulting from the same thawing-carbon-dioxide process believed to form the spider-like features.
The spiders range in size from tens to hundreds of yards (or meters). Multiple channels typically converge at a central pit, resembling the legs and body of a spider. For the past decade, researchers have checked in vain with MRO's High Resolution Imaging Science Experiment (HiRISE) camera to see year-to-year changes in them.
"We have seen for the first time these smaller features that survive and extend from year to year, and this is how the larger spiders get started," said Ganna Portyankina of the University of Colorado, Boulder. "These are in sand-dune areas, so we don't know whether they will keep getting bigger or will disappear under moving sand."
Dunes appear to be a factor in how the baby spiders form, but they may also keep many from persisting through the centuries needed to become full-scale spiders. The amount of erosion needed to sculpt a typical spider, at the rate determined from observing active growth of these smaller troughs, would require more than a thousand Martian years. That is according to an estimate by Portyankina and co-authors in a recent paper in the journal Icarus. One Martian year lasts about 1.9 Earth years.
"Much of Mars looks like Utah if you stripped away all vegetation, but 'spiders' are a uniquely Martian landform," said Candice Hansen of the Planetary Science Institute, Tucson, Arizona, a co-author of the report.
New york Post
Fri, 17 Mar 2017 00:00 UTC
The "near Earth asteroid" - which was discovered by NASA earlier this year - will brush past on Friday.
NASA monitors "near Earth asteroids" or NEOs to predict possible collisions.
This particular space rock is dubbed 2017 EG3.
Potentially Hazardous Asteroids (PHAs) are space rocks larger than approximately 100m that can come closer to Earth than 0.05 AU.
Fri, 17 Mar 2017 00:00 UTC
Whether this pun makes you giggle or groan in pain, your reaction is a consequence of the ambiguity of the joke. Thus far, models have not been able to fully account for the complexity of humor or exactly why we find puns and jokes funny, but a research article recently published in Frontiers in Physics suggests a novel approach: quantum theory.
Aiming to answer the question of what kind of formal theory is needed to model the cognitive representation of a joke, researchers suggest that a quantum theory approach might be a contender. In their paper, they outline a quantum inspired model of humor, hoping that this new approach may succeed at a more nuanced modeling of the cognition of humor than previous attempts and lead to the development of a full-fledged, formal quantum theory model of humor. This initial model was tested in a study where participants rated the funniness of verbal puns, as well as the funniness of variants of these jokes (e.g. the punchline on its own, the set-up on its own). The results indicate that apart from the delivery of information, something else is happening on a cognitive level that makes the joke as a whole funny whereas its deconstructed components are not, and which makes a quantum approach appropriate to study this phenomenon.
Thu, 16 Mar 2017 12:30 UTC
The idea that the brain is made up of numerous regions that perform specific tasks is known as "modularity". And, at first glance, it has been successful. For example, it can provide an explanation for how we recognise faces by activating a chain of specific brain regions in the occipital and temporal lobes. Bodies, however, are processed by a different set of brain regions. And scientists believe that yet other areas - memory regions - help combine these perceptual stimuli to create holistic representations of people. The activity of certain brain areas has also been linked to specific conditions and diseases.
The reason this approach has been so popular is partly due to technologies which are giving us unprecedented insight into the brain. Functional magnetic resonance imaging (fMRI), which tracks changes in blood flow in the brain, allows scientists to see brain areas light up in response to activities - helping them map functions. Meanwhile, Optogenetics, a technique that uses genetic modification of neurons so that their electrical activity can be controlled with light pulses - can help us to explore their specific contribution to brain function.
Mon, 06 Mar 2017 17:35 UTC
Given that the meteorites Lapen and his group studied came from a single ejection site on Mars, they reveal over 2 billion years of stacked lava flows, Lapen said. The discovery could help scientists decipher more about how often volcanoes erupted on Mars, as well as time periods when they were most active.
Lapen explained that the type of volcanic activity that occurs on Mars is called basaltic volcanism, which is similar to the type of volcanism seen, for example, in volcanoes in Hawaii. These types of volcanoes produce fluid lava and are rarely explosive.
But Mars isn't the only extraterrestrial body with volcanoes. Volcanoes—in various forms—are also found on other planets, moons, and even asteroids. Take, for instance, Jupiter's moon Io, which has active volcanoes that spew gas and melted rock, or Venus, which is covered with over 1,000 volcanoes, according to NASA. It's not yet determined whether these venusian volcanoes are active or not.