['One way of determining a person’s likely ethnicity is looking inside their ears. Simply put, there are two kinds of e...', 'One way of determining a person’s likely ethnicity is looking inside their ears. Simply put, there are two kinds of e...']

['Inside America\'s Mount Rushmore National Monument there is a "secret" chamber known as the Hidden Hall of Records. Th...', 'Inside America\'s Mount Rushmore National Monument there is a "secret" chamber known as the Hidden Hall of Records. Th...']

['The most perfectly spherical object ever observed by mankind is the electron. In a series of experiments led by physi...', 'The most perfectly spherical object ever observed by mankind is the electron. In a series of experiments led by physi...']

['In the 17th Century there was a shortage of giants in Europe, and only one man was to blame. The giant-greedy Frederi...', 'In the 17th Century there was a shortage of giants in Europe, and only one man was to blame. The giant-greedy Frederi...']

['When a caterpillar enters the chrysalis stage, it is not merely sprouting wings to become a moth or butterfly. Enzyme...', 'When a caterpillar enters the chrysalis stage, it is not merely sprouting wings to become a moth or butterfly. Enzyme...']

['Consumption of tomato juice is unusually popular on commercial airline flights. For example, German airline Lufthansa...', 'Consumption of tomato juice is unusually popular on commercial airline flights. For example, German airline Lufthansa...']

['While today’s vision of the conductor is that of the be-tuxedoed individual standing in front of an orchestra holding...', 'While today’s vision of the conductor is that of the be-tuxedoed individual standing in front of an orchestra holding...']

['Jack Ketch was a man in need of a career change. As the official executioner during King Charles II’s 17th-century re...', 'Jack Ketch was a man in need of a career change. As the official executioner during King Charles II’s 17th-century re...']

['When inventing a name for an imaginary and/or ridiculous object or concept, the best resource is often a child. A cle...', 'When inventing a name for an imaginary and/or ridiculous object or concept, the best resource is often a child. A cle...']

['On 18 September 1980, an Air Force airman was conducting routine maintenance high in the missile silo at a Titan II n...', 'On 18 September 1980, an Air Force airman was conducting routine maintenance high in the missile silo at a Titan II n...']