Because human senses are adapted for use on the ground, relying on sensory input alone to navigate during flight can be dangerous. Since the senses do not always accurately reflect the movement of an aircraft, they can cause a number of sensory illusions, including those affected by vision and fluid in the inner ear. Some illusions result in false sensations of rotation, while others can cause misconceptions about the orientation of one's aircraft. What is the black-hole approach illusion?
Back in the day
Shortly after seizing control of the Eastern Roman Empire, Flavius Basiliscus alienated his supporters by promoting Miaphysitism—a doctrine which holds that in the person of Jesus there was but a single nature that merged both the human and the divine rather than a dual nature. Consequently, his rule lasted just 20 months. Earlier in his career, Basiliscus led the disastrous invasion of Vandal Africa, one of the greatest military operations in history. How many ships and soldiers were involved?
Born on a day like today
Paul Robeson was an American stage actor, singer, and political activist. The son of a runaway slave who became a minister, Robeson graduated from Rutgers, where he was an All-American football player, and then from Columbia University law school, before turning to theater. Known for his superb bass-baritone, he gained fame for his stage role in Othello. He later became an outspoken activist on issues such as racial justice and international peace. Why was his passport revoked in 1950?