The word “chivalry” comes from the French cheval, which can be translated as "horse soldiery", but later in the 14th century it became associated with knightly ideals. nudes
MRI scans work because of a property of particles called spin. Specifically, MRI takes advantage of the spin of the nuclei of hydrogen atoms to generate images.
Ancient Roman concrete arches contained volcanic ash, which helped them self-heal when cracks formed by reacting with water. This made them incredibly durable, lasting for millennia.
The Eiffel Tower Can Be 15 cm Taller in Summer: Due to thermal expansion, the metal expands when it gets hot, making the tower slightly taller during warmer months.
Ninjas used a system called Goshiki-mai, meaning Five Colored Rice, in which rice grains were painted red, blue, yellow, black or purple in order to leave coded messages or trails.
Tumbleweeds originated in Russia and Siberia and they were brought to the United States in the 1870s, hidden among imported flax seeds. It only took 20 years for the plants to spread throughout the western United States and parts of Canada.
