I was so eagre to convince others I was actually older than I looked, and i would always wear my mum's dark colour clothing at the beginning of my teaching career.
The potential evolution of today's technology, and its social consequences, is dazzlingly complicated, and it's perhaps best left to science fiction writers and futurologists to explore the many possibilities we can envisage.
And as we all look forward to the start of a new decade, it's worth remembering that it is often the small steps, not the giant leaps that bring about the most lasting change.
In 1927, a hitherto unknown airmail pilot called Charles Lindbergh became the first man to complete a solo crossing of the Atlantic in this plane the Spirit of St. Louis.
In taking that giant leap for mankind, the team behind the Moonshot united millions of people around the world -- that this crazy ambition wasn't so crazy after all.