  Dynamical breaking of the electroweak theory, i.e. technicolor, is an
intriguing extension of the Standard Model. Recently new models have been
proposed featuring walking dynamics for a very low number of techniflavors.
These technicolor extensions are not ruled out by current precision
measurements. Here I first motivate the idea of dynamical electroweak symmetry
breaking and then summarize some of the properties of the recent models and
their possible cosmological implications.
