Honeybees use their wings to cool down their hives when temperatures rise, but new University of Colorado Boulder research shows that this intriguing behavior may be linked to both the rate of heating and the size of a honeybee group.

The findings, which were recently published in the journal Animal Behaviour, indicate that honeybees anticipate and react to rapid temperature increases sooner than they do when the increase is gradual -- but only when the bees are clustered in groups of 10.

"Larger groups of bees seem to be better than individuals or small groups at cuing in on how quickly an environment is changing," said Chelsea Cook, a doctoral researcher in the Department of Ecology and Evolutionary Biology at CU-Boulder and lead author of the study.

Multiple dispersals of penguins reached Australia after the continent split from Antarctica, including 'giant penguins' that may have lived there after they went extinct elsewhere, according to a study published April 26, 2016 in the open-access journal PLOS ONE by Travis Park from Monash University, Australia, and colleagues.

Scientists have discovered Sarmientosaurus musacchioi, a new species of titanosaurian dinosaur, based on an complete skull and partial neck fossil unearthed in Patagonia, Argentina, according to a study published April 26, 2016 in the open-access journal PLOS ONE by Rubén Martínez from the Laboratorio de Paleovertebrados of the Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Argentina, and colleagues.

Honey bee colonies in the United States are in decline, due in part to the ill effects of voracious mites, fungal gut parasites and a wide variety of debilitating viruses. Researchers from the University of Maryland and the U.S. Department of Agriculture recently completed the first comprehensive, multi-year study of honey bee parasites and disease as part of the National Honey Bee Disease Survey. The findings reveal some alarming patterns, but provide at least a few pieces of good news as well.

Men with low levels of the male sex hormone testosterone need not fear that testosterone replacement therapy will increase their risk of prostate cancer, according to an analysis of more than 250,000 medical records.

In the study, researchers found that, as a group, men prescribed testosterone for longer than a year had no overall increase in risk of prostate cancer and, in fact, had their risk of aggressive disease reduced by 50 percent.

A University of Iowa-led study of diabetes-related vision impairment holds good news -- and some bad news -- for patients with signs of these disorders.

Scientists have long known that patients with diabetes mellitus -- both Type 1 and Type 2 -- are at high risk for developing diabetic retinopathy, the most common cause of irreversible blindness in adults. Vision loss occurs due to microvascular damage to the retina. People with diabetes are typically not aware that they are also at risk for developing retinal diabetic neuropathy, a loss of the nerve cells in the retina.