One strain of mice that were genetically prone to become obese became resistant to excess weight gain after their populations of gut microbiota were transformed simply by an sharing an environment with other mice, researchers have discovered.
High school students lose sleep on school nights following the change to daylight saving time that occurs in March, a study has concluded. The loss of sleep during the school week was associated with a decline in vigilance and cognitive function, which raises safety concerns for teen drivers.
A protein known to play a role in transporting the molecular contents of normal cells into and out of various intracellular compartments can also turn such cells cancerous by stimulating a key growth-control pathway.
No cures exist for amyotrophic lateral sclerosis (ALS), and the only approved therapy slows the progression by only a few months. A new study identifies a promising unexplored avenue of treatment for ALS, the endothelin system.
Poor sleep might explain how stress impacts health in kids, a new study suggests. Researchers found that getting a good night's sleep might buffer the impact of stress on kids' cortisol level, which is a hormone produced in the adrenal gland to regulate the body's cardiovascular, metabolic and immune systems.
Spatially corrected sea-level records for the Pacific coast indicate that uplift rates are overestimated by 40 percent, scientists report. Uplift is the vertical elevation of Earth's surface in response to plate tectonics.
Orchids, a fantastically complicated and diverse group of flowering plants, have long blended the exotic with the beautiful. Previously, botanists have proposed more than a half dozen explanations for this diversity. Now, research corroborates many of these explanations, but finds no evidence for other logical suggestions, such as that deceitful pollination.
Hopping, tumbling and flipping over are not typical maneuvers you would expect from a spacecraft exploring other worlds. Traditional Mars rovers, for example, roll around on wheels, and they can't operate upside-down. But on a small body, such as an asteroid or a comet, the low-gravity conditions and rough surfaces make traditional driving all the more hazardous. Enter Hedgehog: a new concept for a robot that is specifically designed to overcome the challenges of traversing small bodies.
Today's ice sheets may be more resilient to increased carbon dioxide levels than previously thought, a new study suggests. This work explored these very old conditions and found that sea level might not have risen as much as previously thought -- and thus may not rise as fast as predicted now.
Researchers have designed a new system that automatically turns CAD files into visual models that users can modify in real time, simply by moving virtual sliders on a Web page. Once the design meets the user's specifications, he or she hits the print button to send it to a 3-D printer.
In some patients, aggressive cancers can become resistant to chemotherapy and radiation treatments. In a new paper, researchers identified a pathway that causes the resistance and a new therapeutic drug that targets this pathway.
Researchers involved in an international collaboration across six institutions have successfully identified the exact composition of sea snake venom, which makes the future development of synthetic antivenoms more realistic. Currently, sea snake anitvenom costs nearly USD 2,000, yet these new findings could result in a future production of synthetic antivenoms for as little as USD 10-100.
One of the longstanding debates in science, that has, perhaps unsurprisingly, permeated into the field of stem cell research, is the question of nature versus nurture influencing development. Science on stem cells thus far, has suggested that, as one side of the existential debate holds: their fate is not predestined. But new research suggests that the cells' tabula might not be as rasa as we have been led to believe.
Research has found the when two strangers meet, the more times a man tries to be funny and the more a woman laughs at those attempts, the more likely the woman is interested in the man. When both laugh together, it's an even better indication of a romantic connection. The findings were among the discoveries made as part of a study looking for a connection between humor and intelligence.
Ecologists have discovered a pattern that is consistent across a range of ecosystems. They found that, in a very systematic way, in crowded settings, prey reproduced less than they do in settings where their numbers are smaller. Some scientists are already suggesting that it may well be the discovery of a new law of nature.
Cool. Calm. And oh, so calculated. That's how a chimpanzee living in the Royal Burgers' Zoo in the Netherlands set out to swat an aerial drone that was filming her group. Biologists explain it as yet another example of chimpanzees' make-do attitude to using whatever is on hand as tools.
Scientists may be closer to solving the mystery of how Mars changed from a world with surface water billions of years ago to the arid Red Planet of today. A new analysis of the largest known deposit of carbonate minerals on Mars suggests that the original Martian atmosphere may have already lost most of its carbon dioxide by the era of valley network formation.