A double pendulum is a pendulum with another pendulum attached to its end, and is a simple physical system[?] that exhibits rich dynamic behavior[?]. The double pendulum is governed by very complicated formulas that can be found here (http://scienceworld.wolfram.com/physics/DoublePendulum). The double pendulum relates to:
... Lake Nyasa
M
Fernão de Magalhães, (Ferdinand Magellan, sea explorer)
Ferdinand Magellan, (c. 1470-1521), leader of first expedition around the world
Douglas Mawson - ...