Barefooting

Before the complex tools, before the projectile weapons and the wheels and the civilization, hominids stood upright and walked—and it made all the difference. Bipedalism freed up their hands to carry objects and manipulate the world around them and see for miles and miles across the horizon. They did all this atop bare feet that...

For today’s edition of Dear Mark, I’m answering three questions from readers. First up, what was my main takeaway from the “Japan and meat” video posted last week? Second, are there any circadian-friendly nightlights—ones that don’t negatively affect our natural secretion of melatonin or disrupt our circadian rhythm? And finally, what are my tips for...