"Bold", "provocative", "relentless", "witty" and "an inspiration" – tributes to Prof Stephen Hawking have not been hard to come by at a gathering of more than a hundred of the world's top cosmologists.
The planet's most famous living physicist turns 70 on Sunday and scientists began to assemble in his honour at Cambridge University on Thursday and Friday to raise a toast.
Hard to believe the man has ticked off seven decades, especially considering what he's been up against physiologically. I remember seeing the news that he had made it onto a version of the "Vomit Comet" and for a few brief passes, had enjoyed the ineffable thrill of being weightless. I remember being so happy for him, that he could have such an experience and that his body was no barrier to it.
Let's cheer, indeed, for a brilliant, engaging and witty man who has brought so much more understanding of this world and its workings to us.
ROCK ON, STEPHEN!!!