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Biology/Medicine/Biochemistry

• Mosquito repellents don't repel. They hide you.  The spray blocks the mosquito's sensors so they don't know you're there.

• The liquid inside young coconuts can be used as a substitute for blood plasma.

• Oak trees do not produce acorns until they are 50 years of age or older.

• Apples are more efficient at waking you up in the morning than caffeine.

• Most dust particles in your house are actually dead skin.

• A duck's echo doesn't echo and nobody knows why.

• Baldness, color-blindness, and hemophilia are all X chromosome-linked disorders.  Since women have two X chromosomes, they seldom show the symptoms of these disorders; they would have to have both genes since these traits are recessive.

• While among humans just one chromosome DNA distinguishes males from females (double X for females and XY for males), among birds it is exactly the opposite -- males have two X chromosomes and females X and Y.

• Bees are quite weird when it comes down to genetics.  Bee males develop from unfertilized eggs, meaning that they are only haploid, whereas females are diploid and evolve from fertilized eggs.  Otherwise, bees have no specific sex chromosomes.

• About 50,000 brain cells die daily.

• The heart is the only organ in the body with its own electric pulse supply - the pacemaker.

• You burn more calories when you sleep than by watching TV.

• The longest cell in the human body spans approximately 1 meter. It is a neuron that stretches from the spinal cord through a leg.

• There are about 30,000 genes in human genome that code for protein but there are approx. 100,000 distinctly characterized proteins. The greater amount of proteins is obtained through recombinant splicing (modifications) of the messenger RNA.

Chemistry

• Pearls melt in vinegar.  Somehow I have trouble believing this...

Physics

• Venus is the only planet that rotates clockwise.

• Propagation of light in vacuum is ~3x10^-8 m/s.  That velocity is only 0.03% less when propagation medium is air.

• The light wave consists of a magnetic and electric sinusoidal function, thus impacting both magnetic and electric properties of any compound it strikes.

History/Social Sciences

• Adolf Hitler's mother seriously considered having an abortion but was talked out of it by her doctor.

• All US presidents wore glasses.  Most just didn't like being seen wearing them in public.

• This one's a little longer.  If one would shrink down the world's population to 100 persons then the makeup of that small town would be as follows (year 2000):  57 Asians, 21 Europeans, 14 Americans (South and North), 8 Africans.  52 of them would be women and 48 men.  70 non-whites and 30 whites.  89 heterosexuals and 11 homosexuals.  6 people would own 59% of that world's riches while 80 of them would be living in conditions lacking existence essentials.  70 of them would not be literate, 50 malnourished.  Only one of them would own a computer, and merely one would possess a university degree.  Well...makes one wonder why we  complain about all the things we DON'T have?  People who have all of the above still find excuses to complain about how bad life keeps treating them.

• Throughout history Britain was renown for its strong navy. However, a great deal of their ships were conquered and then refitted French (and other enemy) vessels.

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