The joke our genes and our years play on us is to leave us, as parents, forever with this weird column of figures scribbled on our souls, ones that make no sense, no matter howlongyou squint at them or how hard you try to make them work.
And what if that car, which also knows howlong it will take you to get home from work, could instruct your household thermostat to crank up the heat 10 minutes before your scheduled arrival?
The next time you're on your journey home - be it from work or from holidays - and you're bemoaning the long motorway drive, just think how much worse it would be without the 50-year-old stretch of highway.