Intelligent Design (ID) is the theory that various features of the universe and of living things are best explained by an intelligent cause and not by undirected processes. <ref>http://www.discovery.org/scripts/viewDB/index.php?command=view&id=2348</ref><ref>http://www.discovery.org/scripts/viewDB/index.php?command=view&id=2834&program=CSC%20-%20Scientific%20Research%20and%20Scholarship%20-%20History%20and%20Philosophy%20of%20Science</ref><ref>http://www.discovery.org/scripts/viewDB/index.php?command=view&id=2571</ref><ref>http://www.arn.org/idfaq/What%20is%20intelligent%20design.htm</ref>
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Intelligent Design (ID) argues that life and other aspects of the physical universe are so complex that they must have been designed (see [[irreducible complexity]]). Thus various features of the universe and of living things are best explained by an intelligent cause and not by undirected processes. <ref>http://www.discovery.org/scripts/viewDB/index.php?command=view&id=2348</ref><ref>http://www.discovery.org/scripts/viewDB/index.php?command=view&id=2834&program=CSC%20-%20Scientific%20Research%20and%20Scholarship%20-%20History%20and%20Philosophy%20of%20Science</ref><ref>http://www.discovery.org/scripts/viewDB/index.php?command=view&id=2571</ref><ref>http://www.arn.org/idfaq/What%20is%20intelligent%20design.htm</ref>