They shed bubbles of material at speeds of thousands of miles per second, which collide with surrounding dense clouds of hydrogen.

CNN: Stellar nursery in nearby galaxy teems with activity

This book might seem to tell a depressing tale, but it is enlivened by Ms Elliott's use of folklore material and regional writing to shed light on the intricate and (to the outsider) baffling ways of life and thought of the Ulster people as a whole.

ECONOMIST: Irish history