Your eye color could mean way more than a simple genetic pigmentation. For starters, it might reveal insightful clues into your health and personality. But here’s the shocker: It could also determine who you are most attracted to. While romantic partners may share a few physical traits (and by the way, here’s the science behind …

Pretty much everyone knows that lack of sleep causes fatigue and performance deficiencies, but the worst part is that you stop being aware of these ill-effects after a couple of days. You actually get used to functioning in a fatigued state, yet you don’t realize that you’re overtired and not performing at your best. Sleep-deprived …

Want to live longer? Make close friends — because research shows that friends can affect your health even more than family. The 2005 Australian Longitudinal Study of Aging found that close relationships with children and other relatives had very little impact on how long you live, but people with the most friends tended to outlive …

Napping makes you more alert Napping sometimes gets a bad rap, as if shut-eye during the day indicates laziness. But some of the brightest minds in history, including Albert Einstein and Thomas Edison, were famously nappers. And now, a new body of scientific research is showing the benefits of napping, and how a quick bout …

Sure, athletes have lots to say about grit, but so does science. There’s no arguing that extreme athletes know a thing or two about mental toughness. It takes extreme grit to weather a 24-hour obstacle course as punishing as Tough Mudder, so when race champion Amelia Boone shared the following secret for extreme mental toughness, …