Mars (Illustrated)

Percival Lawrence Lowell (March 13, 1855–November 12, 1916) was a businessman, author, mathematician, and astronomer who was among the first to suggest there were canals on Mars, an important observation that has led the scientists of today to speculate that Mars once held water. He also founded the Lowell Observatory in Flagstaff, Arizona, and formed the beginning of the effort that led to the discovery of Pluto 14 years after his death. The choice of the name Pluto and its symbol were par...