Archaeology

'Getting high' in Paleolithic hunting: Elevated positions enhance javelin accuracy but reduce atlatl efficiency

A recent experimental study led by Kent State University and the Cleveland Museum of Natural History suggests that hunting from elevated positions significantly increases the performance of thrown javelins while potentially ...

Other

Walking in short bursts found to consume 20% to 60% more energy than walking continuously for same distance

A team of pathophysiologists at the University of Milan has found that climbing stairs or walking for short bursts allows people to consume 20% to 60% more energy than if they do the same activity nonstop for the same distance. ...

It's twins! Mystery of famed brown dwarf solved

Hundreds of papers have been written about the first known brown dwarf, Gliese 229B, since its discovery by Caltech researchers at the Institute's Palomar Observatory in 1995. But a pressing mystery has persisted about this ...

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Tech Xplore

Engineers develop new method for ultra-clean biofuel combustion

In new research published in the journal Fuel, Baylor University researchers with the Cornerstone Atomization and Combustion Lab (CAC) have unveiled a pioneering method for the efficient combustion of biofuels, using a revolutionary ...

Chickpeas identified as key crop for future food security

Climate change has a negative impact on food security. An international research team led by Wolfram Weckwerth from the University of Vienna has now conducted a study to investigate the natural variation of different chickpea ...

Mechanism of cobalt–manganese catalysts deciphered

Conventional catalysts for hydrogen production via water electrolysis usually contain precious metals and are expensive. However, cheaper alternatives have been developed, for example cobalt–manganese catalysts. They have ...

Mosquitos lost an essential gene with no ill effects

University of Maryland entomologists discovered that a gene critical for survival in other insects is missing in mosquitos—the gene responsible for properly arranging the insects' segmented bodies. The researchers also ...

Breastfeeding hormones make mothers happier

Oxytocin is one of the most important hormones between a mother and her baby. Researchers at Kyoto University and Azabu University in Japan report in a new study that the levels of oxytocin correspond to a mother's sensitivity ...

Financial distress linked to suicide risk in people with ADHD

Attention deficit hyperactivity disorder is linked to higher levels of financial distress in adults—and a fourfold higher risk of suicide for those with the most debt, according to a large population study.

Scientists identify new hosts for Chagas disease vectors

Solitary weasel-like animals called tayra might look pretty harmless, but some may actually be incubators for a parasite that causes Chagas disease, a chronic, debilitating condition that is spread by insects called kissing ...

Common Core used widely, despite continuing debate

Most of the states that first endorsed the Common Core academic standards are still using them in some form, despite continued debate over whether they are improving student performance in reading and math.