As the Swedish King Gustav III tested the harmfulness of tea and coffee?

Swedish king Gustav III once decided to personally verify that is more harmful to humans - tea or coffee. For this selected set of twins who had been sentenced to death. The first three times a day gave a great cup of tea, the second - coffee. The king himself before the end of the experiment did not survive, being killed. The twins have lived a long time, but the first in the age of 83 years died after all the one who drank tea.

What world-famous inventor in the school called a jerk?

Thomas Edison was in secondary school, only 3 months. He did not show progress, and the teacher even called him a jerk. Then the mother of Thomas Edison decided to teach at home.

What animal in the 16 century the Pope declared the fish?

Colonialists and missionaries in South America met in the 16 century animal capybara - a rodent, a leading semi-aquatic lifestyle. They asked the Pope to declare capybara a fish, so its meat can be eaten during fasts, to which he graciously gave his consent.

What a medieval king had fought as a knight, even being blind?

John of Bohemia in the 14 century, almost 20 years, was King of Bohemia. But in the Czech Republic almost was not, instead, traveled to Europe and participated in various battles that for the French, during the German knights. Even blind, he took part in the Battle of Crecy, tied his reins to about two other knights. In this battle he was killed.

How watermelons helped in testing the Soviet aerospace system?

In 1960-70-ies in the USSR developed aerospace system "Spiral", consisting of the orbital plane, which was flown hypersonic booster aircraft, and then the rocket stage into orbit. To test was designed analogue of the orbital plane, equipped with ski-landing gear poppet legs. Once during a test engine thrust was not enough to budge these skis on a dirt strip. It was decided to drive two truckloads of watermelons that are evenly split into over 70 meters. This provided the necessary and the plane managed to slip off and be dispersed.

Why are some sheep tied behind the trolley and put them on the sheep's tails?

Classification of sheep based on the type of tail. We long winter night sheep tails are very long and accumulate large amounts of fat with good nutrition. The shepherds may have to adapt to such a small tail of a cart or sled, so he is not stripped of the land.

What sets the Japanese instead of manual signatures?

Japanese, instead of signatures on documents put personal seals, which are called "Incas". They represent the core diameter of 25 to 75 millimeters of wood or ivory engraved with hieroglyphics. To carry out critical operations - fixing deals, buying property, opening bank accounts - want to print, recorded in local government.

Which liquid has sufficient viscosity so that it can be used to walk?

If the viscosity of the fluid depends only on its nature and temperature, as, for example, the water, this liquid is called Newtonian. If the viscosity also depends on the velocity gradient, it is called non-Newtonian. Such fluid to the sudden application of force behave like solids. Example - ketchup in a bottle that will not leak until you shake the bottle. Another example - a suspension of corn starch in water. If you pour it into a large capacity, you can literally walk on it, moving the legs quickly and applying sufficient force to each blow.

What animal ancient Chinese used in self-defense?

In ancient China, Pekingese used including self-defense. Small dogs fit easily into the sleeve. In case of danger, they jumped out and rushed to the abuser.