Mathematical Equation Calculates Cost of Walking for First Time

Why do tall people burn less energy per kilogram when walking?

Any parent that takes their kid out for a walk knows that children tire more quickly than adults, but why is that? Do kids and small adults walk differently from taller people or do they tire faster for some other reason? Peter Weyand from Southern Methodist University, USA, is fascinated by the effect that body size has on physiological function.

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Dogs Likely Originated in the Middle East, New Genetic Data Indicate

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Dog breeds and gray wolfs come from same evolutionary tree.

Dogs likely originated in the Middle East, not Asia or Europe, according to a new genetic analysis by an international team of scientists led by UCLA biologists.

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Small Dogs Originated in the Middle East, Genetic Study Finds

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Yorkshire terrier.

A genetic study has found that small domestic dogs probably originated in the Middle East more than 12,000 years ago. Researchers writing in the open access journal BMC Biology traced the evolutionary history of the IGF1 gene, finding that the version of the gene that is a major determinant of small size probably originated as a result of the domestication of the Middle Eastern gray wolf.

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‘Survival of the Cutest’ Proves Darwin Right

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‘Survival of the cutest.’ Domestic dogs have followed their own evolutionary path, twisting Darwin’s directive ‘survival of the fittest’ to their own needs.

Domestic dogs have followed their own evolutionary path, twisting Darwin’s directive ‘survival of the fittest’ to their own needs — and have proved him right in the process, according to a new study by biologists Chris Klingenberg, of The University of Manchester and Abby Drake, of the College of the Holy Cross in the US.

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Streaming Sand Grains Help Define Essence Of A Liquid

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Enlarged microscopic image of sand grains

University of Chicago researchers recently showed that dry granular materials such as sands, seeds and grains have properties similar to liquid, forming water-like droplets when poured from a given source. The finding could be important to a wide range of industries that use “fluidized” dry particles for oil refining, plastics manufacturing and pharmaceutical production.

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Wildlife Faces Cancer Threat

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Animals all around the globe are dying from fibropapillomatosis,
a disease that causes tumors on the skin

While cancer touches the lives of many humans, it is also a major threat to wild animal populations as well, according to a recent study by the Wildlife Conservation Society (WCS). Continue reading… “Wildlife Faces Cancer Threat”

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Mate Selection: Honesty In Advertising Pays Off

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The male peacock’s display attracts mates

Throughout the animal kingdom brilliant colors or elaborate behavioral displays serve as “advertisements” for attracting mates. But, what do the ads promise, and is there truth in advertizing? Researchers at Yale theorize that when males must provide care for the survival of their offspring, the males’ signals will consistently be honest — and they may devote more of their energy to caring for their offspring than to being attractive.

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