Showing 20 articles starting at article 261
< Previous 20 articles Next 20 articles >
Categories: Paleontology: Early Mammals and Birds, Physics: Acoustics and Ultrasound
Published Brains and brawn helped crows and ravens take over the world
(via sciencedaily.com) Crows and ravens have great flying ability, which allows them to gain access to new places more easily. While these skills were key to their success, new research also shows that big bodies and big brains played an important role in helping crows and ravens survive in the new climates they occupied.
Published Pterosaur discovery solves ancient feather mystery
(via sciencedaily.com) Palaeontologists have discovered remarkable new evidence that pterosaurs, the flying relatives of dinosaurs, were able to control the color of their feathers using melanin pigments.
Published Tumors partially destroyed with sound don't come back
(via sciencedaily.com) Noninvasive sound technology breaks down liver tumors in rats, kills cancer cells and spurs the immune system to prevent further spread -- an advance that could lead to improved cancer outcomes in humans.
Published Research reveals human-driven changes to distinctive foraging patterns in North Pacific Ocean
(via sciencedaily.com) The first large-scale study of its kind has uncovered more than 4,000 years' worth of distinctive foraging behavior in a species once driven to the brink of extinction.
Published Ultrasound gave us our first baby pictures can it also help the blind see?
(via sciencedaily.com) While there are no successful non-invasive therapeutics currently available for the treatment of vision loss, researchers at have come up with a new idea to address this growing problem. Currently, ophthalmologists use electronic technology to directly stimulate retinal neurons by implanting electrode devices inside the eye, a technique that requires expensive and invasive surgery. A research team is now exploring a non-surgical solution that could restore sight by using another of the five senses: Sound.
Published Climatic variability might not drive evolutionary change as much as previously thought
(via sciencedaily.com) A new study combining records of climate change during the last 3.5 million years with fossil evidence of mammals in Africa reveals that times of erratic climate change are not followed by major upheavals in evolution.
Published Dynamic rivers contributed to Amazon's rich bird diversity
(via sciencedaily.com) One of the most contentious questions in evolutionary biology is, how did the Amazon become so rich in species? A new study focused on birds examines how the movements of rivers in the Amazon have contributed to that area's exceptional biological diversity. The researchers found that as small river systems change over time, they spur the evolution of new species. The findings also reveal previously unknown bird species in the Amazon that are only found in small areas next to these dynamic river systems, putting them at high risk.
Published 'Ears' for rover Perseverance's exploration of Mars
(via sciencedaily.com) Scientists have built instruments to give humans eyes and a nose on Mars -- and now they are helping add ears as well.
Published Dual-mode endoscope offers unprecedented insights into uterine health
(via sciencedaily.com) A new endoscope design that combines ultrasound with optical coherence tomography can assess the structural features of the endometrium with unprecedented detail. This dual-mode endoscope could help doctors diagnose infertility problems that are related to endometrial receptivity with greater accuracy than current imaging technologies.
Published Mammals put brawn before brains to survive post-dinosaur world
(via sciencedaily.com) Prehistoric mammals bulked up, rather than develop bigger brains, to boost their survival chances once dinosaurs had become extinct, research suggests.
Published The Rule of Two helps make spaces sound better
(via sciencedaily.com) Researchers developed a new acoustic measurement technique in a room with more acoustic combinations than there are ants on Earth.
Published Warming oceans are getting louder
(via sciencedaily.com) Climate change is speeding sound transmission in the oceans and the way it varies over the globe with physical properties of the oceans. Two 'acoustic hotspots' of future sound speed increases are predicted east of Greenland and in the Northwest Atlantic Ocean, East of Newfoundland. In these locations, the average speed of sound is likely to increase by more than 1.5% if 'business-as-usual' high rates of greenhouse gas emissions continue through 2100.
Published Concert hall acoustics for non-invasive ultrasound brain treatments
(via sciencedaily.com) Engineers have developed a device that is a first step to enabling noninvasive, ultrasound-based therapies for the brain. For example, ultrasound waves are currently being used in clinical trials to treat epilepsy.
Published Quantum dots shine bright to help scientists see inflammatory cells in fat
(via sciencedaily.com) To accurately diagnose and treat diseases, doctors and researchers need to see inside bodies. Medical imaging tools have come a long way since the humble x-ray, but most existing tools remain too coarse to quantify numbers or specific types of cells inside deep tissues of the body. Quantum dots can do that, according to new research in mice.
Published New acoustic fabric converts audible sounds into electrical signals
(via sciencedaily.com) Researchers have developed a new acoustic fabric converts audible sounds into electrical signals. They designed a fabric that works like a microphone, converting sound first into mechanical vibrations, then into electrical signals, similarly to how our ears hear.
Published Gravitational wave mirror experiments can evolve into quantum entities
(via sciencedaily.com) Scientists review research on gravitational wave detectors as a historical example of quantum technologies and examine the fundamental research on the connection between quantum physics and gravity. The team examined recent gravitational wave experiments, showing it is possible to shield large objects from strong influences from the thermal and seismic environment to allow them to evolve as one quantum object. This decoupling from the environment enables measurement sensitivities that would otherwise be impossible.
Published Acoustic propulsion of nanomachines depends on their orientation
(via sciencedaily.com) Scientists have now found answers to central questions which had previously stood in the way of acoustic propulsion of nanoparticles.
Published Physicists show how frequencies can easily be multiplied without special circuitry
(via sciencedaily.com) A new discovery by physicists could make certain components in computers and smartphones obsolete. The team has succeeded in directly converting frequencies to higher ranges in a common magnetic material without the need for additional components. Frequency multiplication is a fundamental process in modern electronics.
Published How new bird species arise
(via sciencedaily.com) Much of a centuries-old debate over where and how new bird species form has now been resolved. Researchers have provided evidence that birds in mountainous areas -- where the vast majority of the planet's species live -- have left lowland habitats for higher and higher mountain elevations throughout their evolution. Millions of years of climatic fluctuations have contributed to pushing bird species upslope -- as is probably happening now.
Published Forget mammoths: These researchers are exploring bringing back the extinct Christmas Island rat
(via sciencedaily.com) Dinosaurs went extinct 65 million years ago, mammoths 4,000 years ago, and the Christmas Island Rat 119 years ago. Since becoming a popular concept in the 1990s, de-extinction efforts have focused on grand animals with mythical stature, but now a team of paleogeneticists has turned their attention to Rattus macleari, and their findings provide insights into the limitations of de-extinction across all species.