- For Researchers
- For Librarians
- For Students
- Social Sciences / Arts & Humanities Content
Updated: 1 min 18 sec ago
Although it lived roughly 65 million years before the earliest known occurrence of figs, the fossil wasp's ovipositor closely resembles those of today's fig wasps. A 115-million-year-old fossilized wasp from northeast Brazil presents a baffling puzzle to researchers. The wasp's ovipositor, the organ through which it lays its eggs, looks a lot like those of present-day wasps that lay their eggs in figs. The problem, researchers say, is that figs arose about 65 million years after this wasp was alive.
A new study led by CU-Boulder has shown Madagascar's ring-tailed lemurs are the only wild primates in the world that sleep in the same caves on a nightly basis. Scientists have discovered that some ring-tailed lemurs in Madagascar regularly retire to limestone chambers for their nightly snoozes, the first evidence of the consistent, daily use of the same caves and crevices for sleeping among the world's wild primates.
A protein called Tet1 is partly responsible for giving primordial germ cells a clean epigenetic slate before developing into sperm and egg cells, according to a new study by researchers at Boston Children's Hospital. This discovery could help provide clues to the cause of some kinds of neonatal growth defects and may also help advance the development of stem cell models of disease.
This image shows the beautiful body pattern of the new species G. spectabilis Erwin. Scientists from the Smithsonian Institution describe the Spectacular Guyane False-form beetle, or Guyanemorpha spectabilis, from Guyane (French Guiana). As its name suggests, the newly discovered species stands out among its dull relatives in the Western Hemisphere, with its great size and beautiful coloration. The study was published in the open access journal ZooKeys.
This shows some of the world's 200 remaining wild addax in Termit and Tin Toumma National Nature Reserve in Niger. A new study led by the Wildlife Conservation Society and Zoological Society or London warns that the world's largest tropical desert, the Sahara, has suffered a catastrophic collapse of its wildlife populations.
Get ready: The "new genetics" promises to change faulty genes of future generations by introducing new, functioning genes using "designer sperm." A new research report appearing online in The FASEB Journal, shows that introducing new genetic material via a viral vector into the sperm of mice leads to the presence and activity of those genes in the resulting embryos. This new genetic material is actually inherited, present and functioning through three generations of the mice tested. This discovery—if successful in humans—could lead to a new frontier in genetic medicine in which diseases and disorders are effectively cured, and new human attributes, such as organ regeneration, may be possible.
A male Pacific leaping blenny, Alticus arnoldorum, in Guam. These terrestrial fishes spend all their adult lives on land, on the rocks in the splash zone. One of the world's strangest animals – a legless, leaping fish that lives on land - uses camouflage to avoid attacks by predators such as birds, lizards and crabs, new research shows.
Researchers reporting in the Cell Press journal Current Biology on November 27 have identified a cryptic new species of wild cat living in Brazil. The discovery is a reminder of just how little scientists still know about the natural world, even when it comes to such charismatic creatures. The findings also have important conservation implications for the cats, the researchers say.
This is from the McGill University and The Douglas Mental Health Centre study Research has suggested that a particular gene in the brain's reward system contributes to overeating and obesity in adults. This same variant has now been linked to childhood obesity and tasty food choices, particularly for girls, according to a new study by Dr. Patricia Silveira and Prof. Michael Meaney of McGill University and Dr. Robert Levitan of the University of Toronto.
Green fluorescence shows redox reactions in living Synechococcus cells. Scientists have charted a significant signaling network in a tiny organism that's big in the world of biofuels research. The findings about how a remarkably fast-growing organism conducts its metabolic business bolster scientists' ability to create biofuels using the hardy microbe Synechococcus, which turns sunlight into useful energy.
Here are three scanning electron micrographs of laser-irradiated turkey cartilage, recorded from different perspectives and with different magnification. It was the day after Thanksgiving in 1981, and like most others across the nation, Rangaswamy "Sri" Srinivasan, a researcher at IBM's Thomas J. Watson Research Center in New York, had brought some turkey with him to work. The difference between Srinivasan and everyone else was that the scientist had no plans to eat the leftovers.
This image shows trachea development in the Drosophila fly; the leading cell (Green) is dragging the group of six cells (red). Jordi Casanova, head of the "Morphogenesis in Drosophila" lab at IRB Barcelona and CSIC research professor, and Gaëlle Lebreton, postdoctoral fellow in the same group, have published a study performed using Drosophila melanogaster in the Journal of Cell Science. This work reveals that in a multiple movement, a single cell can act as the leader and can drag the rest with it. The scientists have studied the tracheal development of Drosophila in vivo and describe the morphological characteristics of the leading cell and provide molecular details about how it drives the movement.
Researchers at the University of Copenhagen have unveiled a profound biological process that explains how DNA can be damaged during genome replication. In addition, the scientists developed a new analytical tool to measure the cell's response to chemotherapy, which could have an important impact on future cancer therapy. The results are now published in the scientific journal Cell.
This image shows the female Fufius lucasae described for the first time in this study. Scientists discover three new gorgeous species of the wafer trapdoor genus Fufius – F. minusculus, F. jalapensis, and F. candango. The discovery of the three new species, published in the open access journal ZooKeys, paves the road to understanding the morphological variability of the species in this little known mygalomorph genus.
Predicting adult body height from genetic data is helpful in several areas such as pediatric endocrinology and forensic investigations. However, despite large international efforts to catalogue the genes that influence the stature of humans, knowledge on genetic determinants of adult body height is still incomplete. Now DNA-based prediction of taller-than-average body height is feasible, as reported by researchers from the Netherlands and Sweden in an article published in Springer's journal Human Genetics.
This image shows a great white shark. The great white shark, a major apex predator made famous by the movie "Jaws," is one of the world's most iconic species capturing an extraordinary amount of public fascination. An intriguing question is what makes a white shark so distinctive? One way to address this is to explore the genetic makeup of this remarkable animal.