An adult human has about 5 l of blood in circulation. Considering a blood glucose concentration of 100 mg/dl, this translates into a total a...
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Showing posts with label evolution. Show all posts
Showing posts with label evolution. Show all posts
Men who are skinny-fat: There are quite a few of them
The graph below (from Wikipedia) plots body fat percentage (BF) against body mass index (BMI) for men. The data is a bit old: 1994. The top-...
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Could we have evolved traits that are detrimental to our survival?
costly traits,
evolution,
genes,
genetics,
omega-6,
omega-6 to omega-3 ratio,
research,
Zahavian traits
Let us assume that we collected data on the presence or absence of a trait (e.g., propensity toward risky behavior) in a population of indi...
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Compensatory adaptation as a unifying concept: Understanding how we respond to diet and lifestyle changes
Trying to understand each body response to each diet and lifestyle change, individually, is certainly a losing battle. It is a bit like the ...
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Applied evolutionary thinking: Darwin meets Washington
Charles Darwin, perhaps one of the greatest scholars of all time, thought about his theory of mutation, inheritance, and selection of biolog...
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The evolution of costly traits: A challenge to a strict paleo diet orientation
The fundamental principle of the paleo diet movement is that we should model our diet on the diet of our ancestors. In other words, for opti...
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Pretty faces are average faces: Genetic diversity and health
Many people think that the prettiest faces are those with very unique features. Generally that is not true. Pretty faces are average faces. ...
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The evolution of costly traits: Competing for women can be unhealthy for men
There are human traits that evolved in spite of being survival handicaps. These counterintuitive traits are often called costly traits, or Z...
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We share an ancestor who probably lived no more than 640 years ago
This post is a revised version of a previous post . The original post has been or will be deleted, with the comments preserved. Typically th...
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How come evolution hasn’t made us immortal? Death, like sex, helps animal populations avoid extinction
Genes do not evolve, nor do traits that are coded for our genes. We say that they evolve to facilitate discourse, which is alright. Populati...
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Cortisol, surprise-enhanced cognition, and flashbulb memories: Scaring people with a snake screen and getting a PhD for it!
Cortisol is a hormone that has a number of important functions. It gets us out of bed in the morning, it cranks up our metabolism in prepara...
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