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ScienceDaily: Plants & Animals News |
| PCB contamination in Icelandic orcas: a matter of diet Posted: 06 May 2021 02:41 PM PDT A new study suggests that some Icelandic killer whales have very high concentrations of PCBs (polychlorinated biphenyls) in their blubber. But it seems that other orcas from the same population have levels of PCBs that are much lower. It mainly depends on what they eat. |
| Swiping, swabbing elevates processing plant food safety Posted: 06 May 2021 02:41 PM PDT By swiping surfaces in commercial food processing plants with specially designed rapid-testing adenosine triphospate (ATP) swabs -- which produce a light similar to the glow of fireflies in the presence of microorganisms -- spoilage and foodborne illness could diminish, according to a new study. |
| Most human origins stories are not compatible with known fossils Posted: 06 May 2021 11:21 AM PDT In the 150 years since Charles Darwin speculated that humans originated in Africa, the number of species in the human family tree has exploded, but so has the level of dispute concerning early human evolution. A new review looks at the major discoveries in hominin origins since Darwin's works and argues that fossil apes can inform us about essential aspects of ape and human evolution, including the nature of our last common ancestor. |
| What can a dinosaur's inner ear tell us? Just listen Posted: 06 May 2021 11:21 AM PDT If paleontologists had a wish list, it would almost certainly include insights into two particular phenomena: how dinosaurs interacted with each other and how they began to fly. |
| The cerebellum may have played an important role in the evolution of the human brain Posted: 06 May 2021 11:20 AM PDT The cerebellum -- a part of the brain once recognized mainly for its role in coordinating movement -- underwent evolutionary changes that may have contributed to human culture, language and tool use, according to a new study. |
| Sharks use Earth's magnetic fields to guide them like a map Posted: 06 May 2021 11:20 AM PDT Sea turtles are known for relying on magnetic signatures to find their way across thousands of miles to the very beaches where they hatched. Now, researchers have some of the first solid evidence that sharks also rely on magnetic fields for their long-distance forays across the sea. |
| Artificial color-changing material that mimics chameleon skin can detect seafood freshness Posted: 06 May 2021 11:20 AM PDT Scientists have designed an artificial color-changing material that mimics chameleon skin, with luminogens (molecules that make crystals glow) organized into different core and shell hydrogel layers instead of one uniform matrix. The findings demonstrate that a two-luminogen hydrogel chemosensor developed with this design can detect seafood freshness by changing color in response to amine vapors released by microbes as fish spoils. |
| Blocking viruses' exit strategy Posted: 06 May 2021 09:57 AM PDT Tests of a new antiviral that aims to prevent the deadly Marburg virus from spreading in the body show promise, according to a new study. |
| New study tracked large sharks during hurricanes Posted: 06 May 2021 07:55 AM PDT Biologists tracked large sharks in Miami and The Bahamas to understand how these migratory animals respond to major storms, like hurricanes. |
| Many consumers misinterpret food date labels, yet use them with confidence Posted: 06 May 2021 07:54 AM PDT Misunderstanding food date labeling is common and educational communications are needed to improve consumer understanding, according to a new study. |
| Alzheimer's study: A Mediterranean diet might protect against memory loss and dementia Posted: 06 May 2021 07:53 AM PDT Alzheimer's disease is caused by protein deposits in the brain and the rapid loss of brain matter. But a Mediterranean diet rich in fish, vegetables and olive oil might protect the brain from these disease triggers. |
| New ant species named in recognition of gender diversity Posted: 05 May 2021 10:05 AM PDT A rare and unusual newly discovered ant from Ecuador has been named Strumigenys ayersthey, with the suffix '-they' chosen in contrast to traditional naming practices which, to date, fail to recognize gender diversity formally. The new species is distinguished by its predominantly smooth and shining cuticle surface and long trap-jaw mandibles. |
| Meet the freaky fanged frog from the Philippines Posted: 05 May 2021 08:13 AM PDT Biologists have described a new species of fanged frog discovered in the Philippines known as the Mindoro Fanged Frog. |
| Posted: 05 May 2021 08:13 AM PDT With the help of their custom-built super-resolution microscope, biophysicists have discovered where and why mitochondria divide, putting to rest controversy about the underlying molecular machinery of mitochondrial fission. Mitochondria either split in half or cut off their ends to self-regulate. |
| New hope for effective malaria vaccine Posted: 05 May 2021 08:13 AM PDT A clinical trial showed that the vaccine, 'Sanaria® PfSPZ-CVac' provides 77 percent cross-strain protection against malaria parasites. |
| Bees thrive where it's hot and dry: A unique biodiversity hotspot located in North America Posted: 05 May 2021 08:13 AM PDT Rarely has the United States-Mexico border become the source of positive news of lately. However, a new study demonstrates it's one of the world's top biodiversity hotspots for bees. A multi-year survey found more than 470 bee species in 16km2 of Chihuahuan Desert, equivalent to 14% of all known bee species from the United States. |
| 3D bioprinting technique controls cell orientation Posted: 05 May 2021 08:13 AM PDT Scientists have developed a new approach for directing cell orientation within deposited hydrogel fibers via a method called multicompartmental bioprinting. |
| Tracking down the tiniest of forces: How T cells detect invaders Posted: 05 May 2021 07:20 AM PDT What happens on a molecular level, when our immune system detects antigens? Scientists have found out, how T cells exert tiny forces on antigens. Bonds between T cells and antigen presenting cells break, and this behavior tells the T cell whether or not it has found the right antigen. |
| Bats know the speed of sound from birth, scientists discovery Posted: 05 May 2021 07:20 AM PDT Unlike humans, who map the world in units of distance, bats map the world in units of time. What this means is that the bat perceives an insect as being at a distance of nine milliseconds, and not one and a half meters, as was previously thought. |
| Legendary Sargasso Sea may be sea turtles' destination during mysterious 'lost years' Posted: 05 May 2021 06:44 AM PDT New research indicates that the legendary Sargasso Sea, which includes part of the Bermuda Triangle and has long featured in fiction as a place where ships go derelict, may actually be an important nursery habitat for young sea turtles. Researchers presented evidence of baby green sea turtles arriving at the Sargasso Sea after entering the ocean off the east coast of Florida. |
| Cryptic sense of orientation of bats localized: the sixth sense of mammals lies in the eye Posted: 05 May 2021 04:50 AM PDT Mammals see with their eyes, hear with their ears and smell with their nose. But which sense or organ allows them to orient themselves on their migrations, which sometimes go far beyond their local foraging areas and therefore require an extended ability to navigate? Scientific experiments now show that the cornea of the eyes is the location of such an important sense in migrating bats. |
| A trait of the rare few whose bodies naturally control HIV: 'trained' immune cells Posted: 04 May 2021 04:15 PM PDT Scientists have discover that 'elite controllers' have myeloid dendritic cells that display characteristics of trained innate immune cells. |
| Microfossil found in Scottish Highlands could be 'missing link' in early animal evolution Posted: 03 May 2021 10:56 AM PDT A team of scientists has discovered the fossil of an organism with two distinct cell types that is likely the oldest of its kind ever recorded -- revealing multicellularity perhaps 400 million years before it first appeared in animals, they report. The discovery in the Scottish Highlands suggests that cell differentiation and segregation occurred at least one billion years ago and may have occurred in freshwater lakes rather than the ocean. |
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