Showing 20 articles starting at article 281

< Previous 20 articles        Next 20 articles >

Categories: Paleontology: Early Mammals and Birds, Physics: Acoustics and Ultrasound

Return to the site home page

     (via sciencedaily.com) 

A new study provides vital clues on when killer whales began feeding on other marine mammals.

     (via sciencedaily.com) 

Paleontologists from La Brea Tar Pits develop a whole herd of scientifically accurate extinct animals to use in AR and VR.

     (via sciencedaily.com) 

Abrupt shifts in the evolution of animals -- short periods of time when an organism rapidly changes size or form -- have long been a challenge for theorists including Darwin. Now a newly published research paper supports the idea that even these abrupt changes are underpinned by a gradual directional process of successive incremental changes, as Darwin's theory of evolution assumes.

     (via sciencedaily.com) 

An ultrasound scan can be used to detect cases of prostate cancer, according to new research.

     (via sciencedaily.com) 

The world's abalone are threatened, endangered or otherwise vulnerable in nearly every corner of the planet. If only we could wave a magic wand to know when abalone are ready to reproduce, without even touching them. Scientists have now found that wand -- although it isn't magic, and it only looks like a wand. It's an ultrasound transducer, and it can be used to quickly and noninvasively detect when abalone are ready to spawn, they report in a study this week.

     (via sciencedaily.com) 

Ultrasound scans -- best known for monitoring pregnancies or imaging organs -- can also be used to stimulate cells and direct cell function. A team of researchers has developed an easier, more effective way to harness the technology for biomedical applications.

     (via sciencedaily.com) 

New research uncovers the negative link between flight-worthiness and fight-worthiness in birds. Evolutionary pressure demanded that birds could either fly or arm themselves -- but not both. Furthermore, the new research suggests that developing wings and not bony spurs involved both sexual and natural selection. This insight helps us better understand how the enormous diversity of life and earth came to be.

     (via sciencedaily.com) 

A team of geologists and palaeontologists has discovered that, some 50 million years ago, there was a low-lying continent separating Europe from Asia that they have named Balkanatolia. At the time, it was inhabited by an endemic fauna that was very different from those of Europe and Asia. Geographical changes 40 to 34 million years ago connected this continent to its two neighbors, paving the way for the replacement of European mammals by Asian mammals.

     (via sciencedaily.com) 

Medical researchers have developed a method for producing a low-cost, easy-to-use focused ultrasound device that can help open up the blood-brain barrier for non-invasive procedures and diagnostics.

     (via sciencedaily.com) 

Two new species of fossil birds that lived alongside the dinosaurs have ben discovered near the Great Wall of China. One of the new species had a sensitive, movable bony appendage at the tip of its lower jaw that it might have used to find food.

     (via sciencedaily.com) 

A team of researchers from music, chemistry and computer science is using sound to better understand biochemical processes such as the physical mechanisms of protein folding.

     (via sciencedaily.com) 

Researchers have devised a revolutionary new technique for measuring the microscopic elasticity of materials. Known as SRAS, the technology works by measuring the speed of sound across the material's surface.

     (via sciencedaily.com) 

Scientists have discovered the first evidence of a unique respiratory infection in the fossilized remains of a dinosaur that lived nearly 150 million years ago. Researchers examined the remains of an immature diplodocid -- a long-necked herbivorous sauropod dinosaur, like 'Brontosaurus' - dating back to the Late Jurassic Period of the Mesozoic Era. The dinosaur nicknamed 'Dolly,' discovered in southwest Montana, had evidence of an infection in the area of its neck vertebrae.

     (via sciencedaily.com) 

During the Ice Age, giant mammals such as mammoths, sabre-toothed cats and woolly rhinoceroses once roamed Northern Europe and America. The cold oceans of the northern hemisphere were also home to giants like Steller's sea cow, which grew up to eight meters long and weighed up to ten tons, and has been extinct for around 250 years. Now an international research team has succeeded in deciphering the genome of this ice-age species from fossil bones. They also found an answer to the question of what the genome of this extinct species of sea cow reveals about present-day skin diseases.

     (via sciencedaily.com) 

Scientists have discovered a new fossil that reveals the origin of gills in arthropods.

     (via sciencedaily.com) 

A new study leaves large tooth marks in previous conclusions about the body shape of the Megalodon, one of the largest sharks that ever lived.

     (via sciencedaily.com) 

Using less material in floors is a viable strategy for improving sustainability in buildings, as it can reduce the structure's environmental footprint. Prioritizing only this goal, however, can lead to unwanted effects -- such as an echo in a room or noise traveling between floors, according to architectural engineers.

     (via sciencedaily.com) 

Scientists have demonstrated a technique for the recovery of weak, noise-dominated optical signals.

     (via sciencedaily.com) 

A technique that uses ultrasound images to determine the depth and shape of the hip socket can accurately predict which infants with hip dysplasia will develop normal hip structure and which remain dysplastic, according to a new study. Researchers said statistical shape modeling improves on existing techniques and could spare many infants from unnecessary treatment.

     (via sciencedaily.com) 

Brothers working in a lab discover that sound can be used to analyze the properties of laser-induced graphene in real time.