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Dear Mark: Do Hunter-Gatherers Sleep Less Than We Thought?

For years, we've thought that hunter-gatherers slept like babies: long and hard. They'd drift off as the sun dropped, lingering around the ubiquitous campfire only for a short time, sleep a good 8-10 hours, and waking up at first light bright eyed for the next day. For today's edition of Dear Mark, I'm examining a study that calls these assumptions into question. What if hunter-gatherers don't…

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Can We Feed the World on the Primal Blueprint Diet? – Part 1

Every couple weeks, I get an email that asks about the global sustainability of the Primal Blueprint diet. It's a common question, one that probably deserves a comprehensive answer - or as close to one as I can muster. See, the problem is that the world is really, really big. And the problems that affect the world have many layers. Each of those problems is…

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