What is CBD really good for?

There is a lot of hope in the healing powers of CBD. Unfortunately there's way more hype.

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  • Cannabidiol (CBD) is the most well-known of the 113 cannabinoids found in the cannabis plant.
  • There is strong evidence that CBD might help in an array of problems, including anxiety and pain management.
  • But numerous companies are marketing low doses of CBD with no proven efficacy and charging a premium.
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Being fit boosts your tolerance for cold weather

Yet another reason to keep exercising.

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  • A new study on mice shows that exercise helps them shiver longer.
  • Brown fat did not seem to be the deciding factor in the mice's ability to combat the cold.
  • The combination of exercise and brown fat is a more likely reason why we can endure extreme temperatures.
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How extreme beauty might defy survival of the fittest

Is beauty always a proxy for genetic health and fitness? Charles Darwin didn't think so.

  • The Great Argus Pheasant is a six-foot-long bird with elaborate ornamentation on its wings, including golden orbs that create a 3D optical illusion. It fans its feathers in a full hemisphere above the female hen as part of its mating display. Is all that beauty just a signal of fit and healthy genes?
  • Perhaps not, says Yale ornithologist Richard Prum. The 'beauty happens' hypothesis, or aesthetic evolution by mate choice, was an idea first proposed by Charles Darwin—but it is still not accepted as part of standard evolutionary theory.
  • Prum reasons that the kind of extreme, impractical beauty seen in animals like the Great Argus Pheasant is a result of aesthetic mate choice rather than survival of the fittest. Perhaps some species evolved such beauty because it pleases the animals themselves.
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Why endurance running is humanity's surprising hidden talent

As enjoyable as it is to be a couch potato, humans were built to run.

Photo by Steven Lelham on Unsplash
  • We usually think of our intellect as our strong suit, while our physical bodies seem terribly frail compared to other animals.
  • While humans aren't the fastest animals out there, research has shown that humans are the best endurance runners on the planet.
  • Understanding why our bodies work so well with running helps us understand where we fit in the animal kingdom and might even work as a little extra motivation to get in some cardio exercise.
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10 paradoxes that will stretch your mind

From time-traveling billiard balls to information-destroying black holes, the world's got plenty of puzzles that are hard to wrap your head around.

Big Think
  • While it's one of the best on Earth, the human brain has a lot of trouble accounting for certain problems.
  • We've evolved to think of reality in a very specific way, but there are plenty of paradoxes out there to suggest that reality doesn't work quite the way we think it does.
  • Considering these paradoxes is a great way to come to grips with how incomplete our understanding of the universe really is.
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