Abstract
The Lyα emission line has repeatedly proven itself to be a powerful tool by which to identify and study evolving galaxies at the highest redshifts. In order to use Lyα as a probe of the physical properties of galaxies, it becomes vital to know the Lyα escape fraction (f_esc^{Lyα}). Unfortunately, due to the resonant nature of Lyα, f_esc^{Lyα} may vary in an extraordinarily unpredictable manner. In this contribution we summarize the results we have achieved up to now in understanding and parameterizing the Lyα escape fraction at different evolutionary states of the Universe.
