Birds sing using the syrinx, the avian vocal organ. Singing is usually confined to males and is at its height during the breeding season, when it is used to attract a mate. Birdsongs are usually more complex and longer than birdcalls. There is evidence that songs are learned, while certain calls are inherited. A male chaffinch hatchling, for example, sings a "subsong" but only learns the true song by hearing and imitating adult males. Deaf birds sing, but their songs are different in what way?
Back in the day
Louis XVI was the king of France during the complex sociopolitical conflict that culminated in the French Revolution, but he was shy, dull, and corpulent and lacked the leadership skills necessary for the job. During the revolution, he was caught attempting to flee the Tuileries palace in disguise, and when proof of his counterrevolutionary actions emerged, he was tried for treason and beheaded. It is said that while his blood dripped to the ground, many in the crowd ran forward to do what?
Born on a day like today
Adams was an Irish-born British physician suspected of having been a serial killer. Between 1946 and 1956, more than 160 of his patients, many of them elderly, died under suspicious circumstances—most leaving him money or items in their wills. He was tried for the murder of one patient but was acquitted. He was later convicted of other crimes, but never murder. A 2000 article in the British Medical Journal suggests that Adams may have been the role model for what other serial-killer doctor?