Weekend Link Love – Edition 440

weekend_linklove in-lineRESEARCH OF THE WEEK

Turns out that humans display a ton of biological and psychological diversity.

Dogs know when you’re being selfish, and they don’t like it.

Baltic hunter-gatherers developed agriculture without outside influence.

Using alcohol to sleep isn’t such a good idea.

Salmonella may have killed the Aztec empire.

Vitamin D protects against cold and flu, especially if you’re deficient.


pb-podcast-banner-142Episode 156: Jeff Scot Philips: Jeff Scot Philips reveals all the trickery and misdirection used by the modern food industry.

Each week, select Mark’s Daily Apple blog posts are prepared as Primal Blueprint Podcasts. Need to catch up on reading, but don’t have the time? Prefer to listen to articles while on the go? Check out the new blog post podcasts below, and subscribe to the Primal Blueprint Podcast here so you never miss an episode.


Bait for breakfast.

Do men need more touch?


“It’s not you, it’s your gut bacteria.”


Buried in the news that scientists are close to resurrecting the wooly mammoth is the fact that we have working artificial wombs.

The American chestnut tree may yet return.

A small software startup is helping people get hooked on apps—and break the addiction.

Co-working at the climbing gym.

Gonna need a translation.


Contest you don’t want to miss: Win a Passion Planner and 12 Macadamia Sea Salt collagen bars. Enter here or here.

Podcast I liked: Are you eating too much or too little selenium?

Quote that’s resonating: “I don’t mind not knowing. It doesn’t scare me.”—Richard Feynman.

Article whose message hit me hard: Changing the world with more sleep.

Law that could make a big difference: Making school start times no earlier than 8:30.



One year ago (Feb 19 – Feb 25)


I’ve eaten so much performance fleece that I saw “Patagonia” written on my poop!

– You should get paid, Nocona.

About the Author

Mark Sisson is the founder of Mark’s Daily Apple, godfather to the Primal food and lifestyle movement, and the New York Times bestselling author of The Keto Reset Diet. His latest book is Keto for Life, where he discusses how he combines the keto diet with a Primal lifestyle for optimal health and longevity. Mark is the author of numerous other books as well, including The Primal Blueprint, which was credited with turbocharging the growth of the primal/paleo movement back in 2009. After spending three decades researching and educating folks on why food is the key component to achieving and maintaining optimal wellness, Mark launched Primal Kitchen, a real-food company that creates Primal/paleo, keto, and Whole30-friendly kitchen staples.

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12 thoughts on “Weekend Link Love – Edition 440”

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  1. I thought it was obvious that different ethnic groups have different personalities, and that there was a genetic basis for at least some of it. I’ve been seeing related research for decades. Are evopsych types just not reading what I’ve been reading? Or am I biased because I’m autistic?

    1. What an intriguing post! Most of the kids (and fathers) I work with fall somewhere on the Autism spectrum. A defining feature of many of them is a highly calibrated BS meter. I suspect that there are inter-hemispheric differences that predispose them to make observations that are not constrained by the bias of social limits. I have many kids who are completely neutral about their own perception of gender. I suspect this occurs because typical gender cues have no inherent, intuitive value to them. I’d say they’re not biased, as much as less bound by typical social bias.

      Which brings us to this article. From a scientific standpoint, everything under the sun should be fair game, yet prejudices and biases are so powerful that they prevent open discussion. It’s absolutely radioactive from a social perspective to discuss potential differences in intelligence, in particular, between ethnic groups. I think the complexity of factors that generate differences, from epigenetic forces to staggering social and economic inequity, makes discussing this very challenging. While there is interesting information drawn from evolutionary psych studies, there is the danger that people only get the gist of an article and assume genetic dominance over other factors. This plays into biases of people who believe we have all pulled ourselves up by our bootstraps, and social/economic forces are thus minimized.

    2. Differences due to culture and environment, there is nothing genetically from a racial standpoint that determines personality.

      1. If genetics can determine personality in dog breeds, is it not feasible that some part of human personality could also be determined by genetics?

  2. Regarding making school start times a state law, I personally think that is a bad idea–leave it up to the individual school districts. I work in a school district that chose to push back the high school start time by an hour, but it hasn’t really helped because it moved the time our students are driving or riding the bus more deeply into rush hour, so an hour later start time does not translate into an hour later wake up time, but it does translate into more time being sedentary in a car or bus (and we are not talking about an increase from 5 minutes to 7 minutes, we are looking at more like 20 minutes becoming 30-40 minutes each way). Unfortunately, due to how the school boundaries are drawn, it is not feasible for these kids to walk. My point is not that I believe the later start time is bad (not even sure it is bad in our school district’s case), but merely that state-wide legislation might not recognize that context matters, and later start times do not affect all school districts in the same way…Just as not everyone should go keto, not every school district will thrive until a single set of rules.

    1. Very valid point. But it’s great to see that the science concerning school start times is actually getting attention from policy makers. High school was a grueling experience, with having to wake up at 6:45 (my school started at 8:10). Some others have it even worse with earlier start times. What a great idea, to take the subset of the population that naturally sleeps and wakes up later, and make them up well before the sun is even out.

      Back then my mental health was in the gutter (though eating SAD certainly didn’t help) because I was just so tired all the time. I’m having a much easier time in college maintaining a 4.0 as a premedical student taking much harder courses. Eating primally is a big factor in this, but so is actually being able to meet my sleep needs on a daily basis.

  3. I think the current preoccupation with getting enough sleep is a little overblown. Sleep needs vary considerably. Some people function well or 4 hours. Others do best on 9 or 10 hours. Some people are naturally light sleepers and wake up several times each night. Others crash and don’t budge all night long. There are really too many variables for anyone to credibly state that “x” number of hours are necessary for everybody. We all know when we aren’t getting enough sleep, but sometimes there’s not much we can do about it, other than try to catch up whenever we can

    1. Shary we have a national sleep deficit crisis and aside from oxygen and water adequate sleep is probably the #1 most important factor for good health. I don’t know how you can justify asserting “the current preoccupation with getting enough sleep is a little overblown”.

  4. I always appreciate your weekend link love. I never fail to learn something new from it.

  5. As always, I find this week’s weekend link love extrmely interesting. I really enjoyed your recent article ‘8 alternative therapies worth considering’ too!

  6. Always love this post on a Sunday. I am definitely making the roasted cauliflower…smoked paprika is already a favorite of mine, and roasting makes every veggie taste amazing. And love the idea of the co-working climbing gym…that would be a dream come true for me. Do a little bouldering, then work on happy, healthy and hot!

  7. So now that we know the difficulty of producing healthy food products, could you share the ways you are dealing with the issues in manufacturing Primal Blueprint products?