ScienceDaily: Most Popular News |
- We must forget to avoid serious mental disorders, and forgetting is actively regulated
- What happened when? How the brain stores memories by time
- Dinosaur skull may reveal T. rex's smaller cousin from the north
- Language 'evolution' may shed light on human migration out-of-Beringia: Relationship between Siberian, North American languages
- Key heart failure culprit discovered in tiny piece of RNA
- Building new drugs just got easier
- Laser and radar unveil the secrets of Roman bridges
- Why antisocial youth are less able to see perspective of others
- Mongol Empire rode wave of mild climate, but warming now may be tipping region into unparalleled drought
- Smartphones become 'eye-phones' with low-cost devices
| We must forget to avoid serious mental disorders, and forgetting is actively regulated Posted: 13 Mar 2014 09:32 AM PDT In order to function properly, the human brain requires the ability not only to store but also to forget: Through memory loss, unnecessary information is deleted and the nervous system retains its plasticity. A disruption of this process can lead to serious mental disorders. Scientists have now discovered a molecular mechanism that actively regulates the process of forgetting. |
| What happened when? How the brain stores memories by time Posted: 13 Mar 2014 06:27 AM PDT New research shows that a part of the brain called the hippocampus stores memories by their "temporal context" -- what happened before, and what came after -- and not by content. From brain scans of the hippocampus as the volunteers were answering questions in this study, researchers could identify patterns of activity specific to each image. But when they showed the volunteers the same images in a different sequence, they got different patterns of activity. In other words, the coding of the memory in the hippocampus was dependent on its context, not just on content. |
| Dinosaur skull may reveal T. rex's smaller cousin from the north Posted: 12 Mar 2014 03:20 PM PDT A 70-million-year-old fossil found in the Late Cretaceous sediments of Alaska reveals a new small tyrannosaur. Tyrannosaurs, the lineage of carnivorous theropod ("beast feet") dinosaurs that include T. rex, have captivated our attention, but the majority of our knowledge about this group comes from fossils from low- to mid-latitudes of North America and Asia. In this study, scientists analyzed the partial skull roof, maxilla, and jaw, recovered from Prince Creek Formation in Northern Alaska, of a dinosaur originally believed to belong to a different species, and then compared the fossils to known tyrannosaurine species. |
| Posted: 12 Mar 2014 03:20 PM PDT Evolutionary analysis applied to the relationship between North American and Central Siberian languages may indicate that people moved out from the Bering Land Bridge, with some migrating back to central Asia and others into North America. |
| Key heart failure culprit discovered in tiny piece of RNA Posted: 12 Mar 2014 12:01 PM PDT A small, but powerful, new player in the onset and progression of heart failure has been discovered by cardiovascular researchers. The researchers have also shown how they successfully blocked the newly discovered culprit to halt the debilitating and chronic life-threatening condition in its tracks. |
| Building new drugs just got easier Posted: 12 Mar 2014 12:00 PM PDT A method for modifying organic molecules has been developed that significantly expands the possibilities for developing new pharmaceuticals and improving old ones. The innovation makes it easier to modify existing organic compounds by attaching biologically active "functional group" to drug molecules. A typical small-molecule drug derives its activity from such functional groups, which are bound to a relatively simple backbone structure consisting chiefly of carbon atoms. |
| Laser and radar unveil the secrets of Roman bridges Posted: 12 Mar 2014 05:26 AM PDT Discovering hidden arches, visualizing the sloped outline characteristic of the medieval period, finding a Renaissance engraving on a Roman arch or detecting restorations: these are some of the results that have been obtained in a recent study of more than 80 roman and medieval bridges. The assessment was carried out with the help of a ground-penetrating radar, a laser scanner and mathematical models, technology that benefit conservation. |
| Why antisocial youth are less able to see perspective of others Posted: 11 Mar 2014 10:36 AM PDT Adolescents with antisocial personality disorder inflict serious physical and psychological harm on both themselves and others. However, little is yet known about the underlying neural processes. Researchers have pinpointed a possible explanation: Their brain regions responsible for social information processing and impulse control are less developed. |
| Posted: 10 Mar 2014 12:21 PM PDT Researchers studying the rings of ancient trees in mountainous central Mongolia think they may have gotten at the mystery of how small bands of nomadic Mongol horsemen united to conquer much of the world within a span of decades, 800 years ago. The rise of the great leader Genghis Khan and the start of the largest contiguous empire in human history was propelled by a temporary run of nice weather. |
| Smartphones become 'eye-phones' with low-cost devices Posted: 07 Mar 2014 08:10 AM PST Researchers have developed two inexpensive adapters that enable a smartphone to capture high-quality images of the front and back of the eye. The adapters make it easy for anyone with minimal training to take a picture of the eye and share it securely with other health practitioners or store it in the patient's electronic record. |
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