Evolution of differentiated multi-threaded digital
organisms
Intelligent Robots and Systems, 1999. IROS '99.
Proceedings. 1999 IEEE/RSJ International Conference
on, 1, page 1--10. (1999)DOI: 10.1109/IROS.1999.812972
Abstract
Presents a descriptive natural history of the results
of the evolution of differentiated multi-threaded
(multi-cellular) self-replicating machine code programs
(digital organisms), living in a network of computers,
called the Tierra network. Programs are differentiated
in that different threads execute different code (i.e.
they express different genes). The seed organism
develops into a mature ten-celled form, differentiated
into a two-celled reproductive tissue and an
eight-celled sensory tissue. The sensory threads obtain
data about conditions on the machines in the network,
and then process that data to choose the best machine
to migrate to or to send the daughter to. Evolution
leads to a diversity of algorithms for foraging for
resources, primarily CPU time, on the network
