Does the CMB do it for you?

In Cardiff University we teach a Physics degree and an Astrophysics degree (and actually a degree which is half way in between). The 'physics' cohort of students are always asking me why they need to know about the Cosmic Microwave Background. So I've made a poll to see if it is just me that thinks all phys/astro students should know about it because it is fairly fundamental physics.

If the poll below does not work, have a look at