Given a choice, male dyeing poison frogs snub empty pools in favor of ones in which their tiny tadpoles have to metamorphose into frogs in the company of larger, carnivorous ones of the same species. The frog fathers only choose to deposit their developing young in unoccupied pools when others are already filled with tadpoles of a similar size as their own. These are seemingly counterintuitive decisions, given how often cannibalism involving a large tadpole eating a smaller one takes place in natural pools, writes Bibiana Rojas of the University of Jyväskylä in Finland. Her findings are published in Springer's journal Behavioral Ecology and Sociobiology.

A few years ago, sugar was engaged in a ground war against corn syrup, and the public relations campaign against high fructose corn syrup was so successful that even corn syrup carried labels saying 'no HFCS' while bleached white sugar was portrayed as a healthier alternative.

But now bleached white table sugar is under the gun also. It doesn't make much difference, really, sugar is sugar. And replacing fructose with glucose won't do a thing to make people healthier, according to a paper in Current Opinion in Lipidology, which shows that when portion sizes and calories are the same, fructose and glucose are the same.

Marriage is good for the health of men's bones - but only if they marry when they're 25 or older, new UCLA researcher suggests.

In a study published online in the peer-reviewed journal Osteoporosis International, researchers found evidence that men who married when they were younger than 25 had lower bone strength than men who married for the first time at a later age.

In addition, men in stable marriages or marriage-like relationships who had never previously divorced or separated had greater bone strength than men whose previous marriages had fractured, the researchers said. And those in stable relationships also had stronger bones than men who never married.

Looking strictly at the economic costs and benefits of three different roof types—black, white and "green" (or vegetated)—Lawrence Berkeley National Laboratory (Berkeley Lab) researchers have found in a new study that white roofs are the most cost-effective over a 50-year time span. While the high installation cost of green roofs sets them back in economic terms, their environmental and amenity benefits may at least partially mitigate their financial burden.

While marketing campaigns against farming claim otherwise, agricultural practices can have a broad beneficial influence on bird abundance and diversity. Row crops are considered to be bad for wildlife but a new study shows that isn't necessarily true.

The report finds that several bird species – some of them rare – are making extensive use of soybean fields in Illinois.

The team spent about 13 weeks each spring and summer in 2011 and 2012 scouring a total of 24 fields (12 per year) in two counties in Central Illinois. The fields were 18 to 20 hectares (44-49 acres) on average, and the researchers walked roughly 3,200 kilometers (1,988 miles) in the course of the study.

(Santa Barbara, Calif.) — A device that can monitor the levels of specific drugs as they flow through the bloodstream may soon take the guesswork out of drug dosing and allow physicians to tailor prescriptions to their patients' specific biology. Developed by UC Santa Barbara researchers Tom Soh, Kevin Plaxco and Scott Ferguson, the biosensor combines engineering and biochemistry and has far-reaching potential.

Doctors and pharmaceutical companies can generally determine reasonable drug doses for most patients through batteries of tests and trials. However, the efficacy of a drug treatment relies on maintaining therapeutic levels of the drug in the body, a feat not so easily accomplished.