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Gregory Chaitin, born in 1947, is an ArgentineAmerican computer scientist and mathematician. Still in his teens, he independently developed Algorithmic Information Theory few years after Komolgorov and his own version of Gödel’s incompleteness theorem. His work on Algorithmic Information Theory led him to define Chaitin’s constant, a number of infinite complexity which is definable but not computable, and which contains all the information in pure mathematics.
He is now working on Metabiology, a mathematical approach to biology, studying the random evolution of computer software in an attempt to understand biological evolution and the emergence of creativity in a rigorous, mathematical way.
Gregory Chaitin is currently working at the IBM Thomas J. Watson Research Center and as a visiting professor in several universities; he has honorary doctorates from the universities of Maine (Orono) and Cordoba (Argentina).
Chaitin’s lecture notes on metabiology can be found here.
Visit Gregory Chaitin’s homepage.
An interview with Gregory Chaitin
Answers from this author by topic
What is life?
“What I’m working on is the idea that DNA is essentially a digital programming language” 

What is creativity?
“Creativity is necessarily an incomputable function” 

What is the Universe made of?
“The world is discrete, it’s built out of zeros and ones, out of bits, and God is a computer programmer” 

What is free will?
“There’s an illusion of free will” 