November 2011
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October 2011
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Scrap board: Boltzmann brain paradox →
hayashiyus:
Boltzmann brains are often referred to in the context of the “Boltzmann brain paradox” or “problem”.
The concept arises from the need to explain why we observe such a large degree of organization in the universe. The second law of thermodynamics states that the entropy in the…
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“Science is a way of thinking much more than it is a body of knowledge. Its goal...”
– Carl Sagan (via cwnl)
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Astronomers Pin Down Galaxy Collision Rate →
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What are our bodies made of exactly?
bloodredorion:
It depends on how you view it.
Your body is composed of different types of tissues: Fat, bones,teeth, brain, the nervous system, connective tissue, blood, lymph, the digestive tract, urine, and the air in your lungs.
But by mass, 65–90% of our body’s cells are water (H2O). So, oxygen takes up a large portion of our body mass. Almost 99% of the mass of the human body is made...
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Why Do We Have Wisdom Teeth? →
astrotastic:
“Anthropologists believe wisdom teeth, or the third set of molars, were the evolutionary answer to our ancestor’s early diet of coarse, rough food – like leaves, roots, nuts and meats – which required more chewing power and resulted in excessive wear of the teeth. The modern diet with its softer foods, along with marvels of modern technologies such as forks, spoons and knives,...
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