Sweat is like a fingerprint. Its composition is a combination of compounds that is uniquely yours. So while everyone sweats, no two people sweat the same.
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.
Constantinople, the capital of the Byzantine Empire, fell to the Ottoman Empire on May 29, 1453. This event marked the end of the Byzantine Empire and is considered one of the key events that signified the end of the Middle Ages.
The brain of adult men is approximately 10% larger than that of women. Because men are typically taller and have more muscle mass than women, their brains require more neurons to control the body.
Curly hair may have offered evolutionary advantages
Studies suggest curly hair could have aided heat regulation and brain protection in early humans by trapping air and shielding the scalp from UV radiation more effectively than straight hair.
Butterflies have good eyesight within 10-12 feet, but any farther, things look blurry. They also must rely on ultraviolet colors (invisible to the human eye) to find mates and the right flowers.
Fact: On August 6, 1945, the U.S. dropped an atomic bomb on Hiroshima, Japan, killing over 140,000 people by the end of the year. This was a key event leading to the end of World War II.
