The five most-read posts on Scope this week were:
"Barefoot" running craze still going strong: Claims that barefoot running yields certain benefits have been substantiated to some degree by researchers, but doctors caution the practice is not for everyone.
Firefly lights path to faster cancer drug research: In a study just published in Proceedings of the National Academy of Sciences, Stanford's Sanjiv Gambhir, MD, PhD, and his colleagues show firefly luciferase - the protein that makes fireflies light up - could illuminate a path to accelerated cancer-drug research.
Blogger asks: To Ritalin or not to Ritalin? Joe Newman, a behavioral specialist for children, writes a moving first-person piece on being diagnosed with ADHD at a young age.
Do muscles retain memory of their former fitness? A study published this week in Proceedings of the National Academy of Sciences suggests muscles may retain a memory of their former fitness even as they wither from lack of use.
Being "emotionally available" may be key to getting your baby to sleep: In one of the first studies to use direct observation of infant sleep patterns, researchers at Penn State University found being "emotionally available" might be key to getting infants and toddlers to sleep better.