E&O insurance (for errors and omissions) covers both errors of commission and errors of omission.

During the early, pretheater period (ca. 700-1350), both religious and secular performing arts prospered.

On Math, Matter and Mind Max Tegmark refers to the many-worlds situation of component 'observers' as moving from a 'birds eye' view to a 'frog view', the frog being inside the process of the wavefunction (figure 3).

Light fields from the radiation pressure force and the dipole gradient potential, needed to cool atoms to submillikelvin temperatures, also play an active role in the collision processes themselves.