Boole (tree) the largest in Converse Basin Grove, was named around 1895 by A.H. Sweeny, a Fresno doctor, after Franklin A. Boole, a supervisor of the logging operation who spared the tree's life due to its great size. Before 1931, it was thought by many to be the largest tree in the world (although the General Grant Tree was more popularly known as the largest tree in the world at that time), but it is now known as the sixth largest tree, after five other giant sequoias: the General Sherman tree, the General Grant, the President tree, the Lincoln tree, and the
Hyperion (tree) report it to be roughly 700–800 years old. The exact location of Hyperion is kept in secret to prevent visitors and protect the tree from damage. Researchers stated that woodpecker damage at the top may have prevented the tree from growing taller. In February 2012, Hyperion was featured in the BBC Radio 4 documentary "James and the Giant Redwoods" by James Aldred. Hyperion (tree) Hyperion is the name of a coast redwood ("Sequoia sempervirens") in California that was measured at , which ranks it as the world's tallest known living tree. Hyperion was discovered August 25, 2006, by naturalists Chris