I lived rough, by my wits, was homeless, lived on the streets, lived on friends' floors, was happy, was miserable.
In my early life, I was a professional folk singer. I used to sing on the national television and radio in Canada. Nobody knows that - but now I've said it, haven't I? I'm strictly a shower singer at the minute.
We look at distant exploding stars called supernovae, and we've developed techniques to measure how far away they are and how fast they're moving away from us.
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