Africa Screams only time that Shemp Howard and Joe Besser appeared together in a film; Besser would replace Howard as one of the Three Stooges following the latter's death in 1955. The main character's name Stanley Livington is suggestive of the surnames of British explorers Henry Morton Stanley and David Livingstone who had a famous meeting in 1871. It is not known whether the change from Livingstone to Livington is the result of a typist's error or a deliberate obfuscation. As this film is in the public domain in the United States, there have been a variety of DVD releases from multiple
19th century in science later in the 19th century by the German mathematician Bernhard Riemann; here no parallel can be found and the angles in a triangle add up to more than 180°. Riemann also developed Riemannian geometry, which unifies and vastly generalizes the three types of geometry. The 19th century saw the beginning of a great deal of abstract algebra. Hermann Grassmann in Germany gave a first version of vector spaces, William Rowan Hamilton in Ireland developed noncommutative algebra. The British mathematician George Boole devised an algebra that soon evolved into what is now called Boolean algebra, in which the only numbers were