While the guillotine was working over-time during the French Revolution, this tortoise was stretching his baby legs on the hot sands of the Galapagos Islands. Through the turbulent Napoleonic era, through the Industrial Revolution, through human conflict into the Atomic Age, he was slowly growing up. Today, he is a virile young man at the age of about 160 years - taking things as easy as ever-at the Taronga Park Zoo. Known for some obscure reason as Tiddles he now weighs almost 3 cwt, and should