Wallace Line Line. Wallace Line The Wallace Line or Wallace's Line is a faunal boundary line drawn in 1859 by the British naturalist Alfred Russel Wallace and named by English biologist Thomas Henry Huxley, that separates the ecozones of Asia and Wallacea, a transitional zone between Asia and Australia. West of the line are found organisms related to Asiatic species; to the east, a mixture of species of Asian and Australian origin is present. Wallace noticed this clear division during his travels through the East Indies in the 19th century. The line runs through Indonesia, between Borneo and Sulawesi (Celebes), and through
Simson line Simson line In geometry, given a triangle "ABC" and a point "P" on its circumcircle, the three closest points to "P" on lines "AB", "AC", and "BC" are collinear. The line through these points is the Simson line of "P", named for Robert Simson. The concept was first published, however, by William Wallace in 1797. The converse is also true; if the three closest points to "P" on three lines are collinear, and no two of the lines are parallel, then "P" lies on the circumcircle of the triangle formed by the three lines. Or in other words, the Simson