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74 articles from ScienceDaily

New pig brain maps facilitate human neuroscience discoveries

For nearly a decade, scientists have relied on an MRI-based map, or atlas, of the pig brain - developed using 4-week-old pigs - to understand where and how nutrients and other interventions affect the developing brain. Now, scientists have updated that atlas, increasing its resolution by a factor of four, and they have also added a new atlas for adolescent 12-week-old pigs.

Modern human brain originated in Africa around 1.7 million years ago

The human brain as we know it today is relatively young. It evolved about 1.7 million years ago when the culture of stone tools in Africa became increasingly complex. A short time later, the new Homo populations spread to Southeast Asia, researchers have now shown using computed tomography analyses of fossilized skulls.

Chronic sinus inflammation appears to alter brain activity

The millions of people who have chronic sinusitis deal not only with stuffy noses and headaches, they also commonly struggle to focus and experience depression and other symptoms that implicate the brain's involvement in their illness. New research links sinus inflammation with alterations in brain activity, specifically with the neural networks that modulate cognition, introspection and response...

Giant radio pulses from pulsars are hundreds of times more energetic than previously believed

Scientists using coordinated observations of the Crab pulsar in a number of frequencies, have discovered that the 'giant radio pulses' which it emits include an increase in x-ray emissions in addition to the radio and visible light emissions that had been previously observed. This finding, published in Science, implies that these pulses are hundreds of times more energetic than previously...

The tuberculosis pathogen releases its toxin by a novel protein transport system

Six years ago, researchers described the first toxin ever found for the deadly pathogen Mycobacterium tuberculosis. However, the mechanism for its secretion from the bacterium was unknown. Now, researchers describe two small Esx proteins that form pores in bacterial membranes and are essential for toxin release. This transport system may be widespread across many Gram-positive bacteria that...

Caught speeding: Clocking the fastest-spinning brown dwarfs

Astronomers have discovered the most rapidly rotating brown dwarfs known. They found three brown dwarfs that each complete a full rotation roughly once every hour. That rate is so extreme that if these 'failed stars' rotated any faster, they could come close to tearing themselves apart. Identified by NASA's Spitzer Space Telescope, the brown dwarfs were then studied by ground-based telescopes...

Pulp mill waste hits the road instead of the landfill

Waste materials from the pulp and paper industry have long been seen as possible fillers for building products like cement, but for years these materials have ended up in the landfill. Now, researchers are developing guidelines to use this waste for road construction in an environmentally friendly manner.

Bacteria help plants grow better

A current study by scientists sheds light on an unusual interdependence: Maize can attract special soil bacteria that, in turn, help the plants to grow better. In the long term, the results could be used to breed new varieties that use less fertilizer and therefore have less impact on the environment.