Contrary to popular belief, donkeys belong to one of the smartest ungulates. They, for example, use their chin hair to test whether there is current going through a wire fence and if they have to walk thru dangerous grounds, they will only start if their master walks through first.
In the Middle Ages, all believed as did Aristotle, that the heart is the center of intelligence.
In Denmark there is a special military unit that uses dog sleds for official transport.
During the Secession war troops would return to their cartels with a big sign that read “0 Killed”. From that, the phrase O.K. derived from.
In one day the heart beats around 100.800 times. It pumps through the blood vessels as much blood as it would take to fill about 170 average bathtubs.
The power of the first lasers was measured by the number of razor blades the laser beams could pass through.
