Of course they do exist. Not only for biological life, but for possible silicon-based. For example, near the Galactic Center our modern electronics hardly could function in a normal manner due to hard radiation from something resembling accretion disk near supermassive black hole and other cosmic curiosities.

More exotic chestnut for you: our epoch in (still very young, see, e.g., Count to the Eschaton sequence by John C. Wright, or Tomorrow and Tomorrow by Charles Sheffield) Universe is marked by Cosmological Coincidence Problem. Energy densities of dark energy (sometimes called also vacuum energy) and dark matter scaled so differently during the expansion history of the universe. But lo, they nearly equal today (well, not strictly today, but starting approximately from z ∼ 0.55). By z I mean redshift.

Nobody knows why is it so and to what extent it facilitates possible activities of life forms. Nobody knows what precisely dark matter and dark energy are, for that matter, despite them totalling ca. 95% of the Universe as we know it. But furthermore, to get this coincidence, their ratio must be set to a specific, infinitesimal value in the very early Universe.