Just joined and reading some of your contributions I'm wondering at almost 79 years whether I'm the oldest (though I'm sure not the wisest) here. I've always been interested in science and thats how I happened upon this community. I'm retired, married and have three grownup kids and seven grandchildren. Sadly, my wife had a severe stroke some six years ago and a lot of my time is spent as a full time carer. I've lived in Australia for four years and the USA for three years - both really good experiences. Now back in England in the West Country. Bob