From the ICR’s URCall series of videos, hosted by Markus Lloyd. “Blue Stars” (link)
Blue stars burn so brightly that they consume their fuel much faster than other stars. The hottest blue stars last only a few million years, and no astronomer has ever observed a new blue star forming. So, if astronomers are still seeing blue stars – which should have burned out a long time ago – how can the universe be billions of years old?