ABC News, September 30. A king-sized coprolite. Scientists report evidence of billion year old worms. CNN Interactive, September 30. Cooke, Robert. 1998.
Researchers say worms once ruled the Earth.
Newsday, reprinted in Spokane Spokesman-Review, October 1. Day, S. 1998a. Day, S. 1998b. Geiger, B. 1998. Heaps of confusion.