Why Does Mary Wear Blue?

I have just been to see the film the Nativity and it brought a question to my mind. Why do we always put Mary in blue when we recreate the Nativity? Even in the film Mary changes into blue before she gives birth. Is there some relevance to blue or did people many years ago decide blue was a pretty colour and we just haven't changed it? I may of course be being really stupid and there may be a really obvious Biblical reference to it that I just don't know but if anybody has an answer I would be grateful to hear it.

Apparently We Only Save Certain Animals

I have just watched the TV programme Extinct on ITV. I have never watched it before and as I don't know if any of you have either I'll tell you what the show is like. The programme has been running all week and as I am to understand it, it focuses on two out of a possible seven endangered animals that are soon to become extinct each day. As well as finding out about these animals throughout the programme the seven animals run across the bottom of the screen with telephone numbers. Now as I have never seen the show before I thought 'oh that's nice they are taking a poll to see what the nation's favourite animal is' but no. I discover towards the end of the show that you are in fact ringing to decide what animal you want to save. I was astounded how can u decide what animal you want to become extinct. What right do we have to decide what animal out of the seven gets half of the money raised by the phone calls? Why does one animal deserve the money more than another? This is living proof that today's society has gone mad with the need to have phone polls on every televison show possible.