Andrew Fielding Huxley (November 22, 1917 - May 30, 2012) was an English physiologist and biophysicist. He was interested in the transmission of electrical signals along nerve fibers. Alan Lloyd Hodgkin invited Huxley to join him researching the problem. Using equipment largely of their own construction and design, including one of the earliest applications of a technique of electrophysiology known as the voltage clamp, they were able to record ionic currents. When WWII broke out their research was abandoned. In 1946 they continued their collaboration, and came up with the solution that nerve impulses, or action potentials, don't travel down the core of the fiber, but rather along the outer membrane of the fiber as cascading waves of sodium ions diffusing inward on a rising pulse and potassium ions diffusing out on a falling edge of a pulse. In 1963 he was jointly awarded the Nobel Prize in Physiology or Medicine for his part in discoveries concerning the ionic mechanisms of the nerve cell. In 1980, he was elected as President of the Royal Society, a post he held until 1985. He died in 2012 at the age of 94.