Why do we sleep? Should we nap?

I have written in the past about sleep, in particular how interesting and revealing the study of sleep was for me at University (see here). What has always baffled me is that Sleep Researchers still have never scientifically proven why adult human beings need to...

Mystery solved: Swing your arms to save energy!

A recent study by team of three biomedical researchers from the USA and Holland (headed by Steven Collins at the University of Michigan) has, according to all the newspaper articles I ran across, solved the “burning mystery” why people tend to swing their...

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