DALLAS, March 19, 2014 — When cancer spreads from one part of the body to another, it becomes even more deadly. It moves with stealth and can go undetected for months or years. But a new technology that uses "nano-flares" has the potential to catch these lurking, mobilized tumor cells early on. Today, scientists presented the latest advances in nano-flare technology as it applies to the detection of metastatic breast cancer cells.

The report was one of more than 10,000 at the 247th National Meeting & Exposition of the American Chemical Society (ACS). The meeting is taking place here through Thursday.

Researchers from the Santa Fe Institute and the Smithsonian Institution have pieced together a highly detailed picture of feeding relationships among 700 mammal, bird, reptile, fish, insect, and plant species from a 48 million year old lake and forest ecosystem.

Their analysis of fossilized remains from the Messel deposit near Frankfurt, Germany, provides the most compelling evidence to date that ancient food webs were organized much like modern food webs. Their paper describing the research appears online and open access this week in Proceedings of the Royal Society B: Biological Sciences.

New research led by the University of Exeter suggests that rising global temperatures will increase the quantity of the key greenhouse gas methane emitted from freshwater ecosystems to the Earth's atmosphere – which could in turn lead to further warming.

The collaborative study, led by Dr Gabriel Yvon-Durocher from the University of Exeter, collated data from hundreds of laboratory experiments and field surveys to demonstrate that the speed at which methane fluxes increase with temperature was the same whether single species populations of methanogens, microbial communities or whole ecosystems were analyzed.

Building a strong connection to a social group helps clinically depressed patients recover and helps prevent relapse, according to a new study.

For the paper, Canadian Institute for Advanced Research (CIFAR) Senior Fellow Alexander Haslam, lead author Tegan Cruwys and their colleagues at the University of Queensland conducted two studies of patients diagnosed with depression or anxiety. The patients either joined a community group with activities such as sewing, yoga, sports and art, or partook in group therapy at a psychiatric hospital.

Rutting stags and clawing bears are but two examples of male animals fighting over a mate, but research in New Phytologist has uncovered the first evidence of similar male struggles leading to the evolution of weaponry in plants.

The team, led by Dr. Andrea Cocucci from the Instituto Multidisciplinario de Biologia Vegetal of Argentina, studied a species of milkweed (Apocynaceae), found in tropical climates. While plants do not mate like animals, but rather reproduce via pollinators such as insects or birds, competition between individuals to exploit those pollinators can result in confrontation between the plants.

If people need to reduce salt intake, relying on them to do it is less effective than teaching them how to flavor food with spices and herbs, according to research presented at the American Heart Association's Epidemiology&Prevention/Nutrition, Physical Activity & Metabolism Scientific Sessions 2014.

In the first phase of the study, 55 volunteers ate a low-sodium diet for four weeks. Researchers provided all foods and calorie-containing drinks. Salt is the main source of sodium in food.

In the second phase, half of the study volunteers participated in a 20-week behavioral intervention aimed at reducing their sodium intake to 1,500 mg/day by using spices and herbs. The other half reduced sodium on their own.

Genetic analysis of ancient poop found off the coast of Mexico suggests bighorn sheep may be native to Tiburón Island, the largest island in the Gulf of California and Mexico.

Bighorn sheep were not thought to inhabit Tiburón Island prior to their introduction in 1975 but scientists discovered fossilized dung in the mountains of Tiburón Island that challenges that assumption. Scientists compared the pellet-shaped poop to fecal pellets of other large mammals and extracted DNA to sequence and determine the origin.

In the television show "Cosmos", the writers and host Neil deGrasse Tyson implied that the atmosphere on Venus was due to a runaway greenhouse gas effect. They also said Giordano Bruno was a martyr for astronomy and that Saturn was the 'jewel' of the solar system.

The only one of those partially correct is that Earth has a variety of factors that make our built-in atmospheric carbon dioxide regulator work where the one on Venus does not – including geologic cycles that churn up the planet's rocky surface. We also have gravity that keeps hydrogen from escaping into space after solar radiation breaks them, as happens on Venus.

Golfers would rather they not hit a rock with their titanium alloy golf clubs anyway, but now they have a more compelling reason than the cost of buying a new one; they can create sparks that are more than 3,000 degrees Fahrenheit which can ignite dry foliage.

So if you really want to golf during the drought, you now have one more thing to overthink while playing. 

In a Fire and Materials, the authors say Orange County, California, fire investigators asked U.C. Irvine to determine whether such clubs could have caused blazes at Shady Canyon Golf Course in Irvine and Arroyo Trabuco Golf Club in Mission Viejo a few years ago.