Youth versus experience has been a topic of discussion in just about every sport and is a perennial talking point. You often hear people say if they're good enough at a young age, stick them on the field and let them have a go.
In motorsport it's almost mandated that by the time you get to the top of your respective category you have to be either in your late teens or early 20s. Just have a look at Formula One where a number of drivers have only just made it into their 20s.
Some reckon that if you haven't made it by then you're too old. I'd say that motorsport, at the elite level, is probably the most ageist sport of them all. However, there is the odd exception. Just look at our very own Brendon Hartley, who at 28 has been signed to race for Scuderia Toro Rosso.
However, it's not Hartley who is the real exception to the rule. Its Italian MotoGP rider and former world champion Valentino Rossi who is the benchmark for hanging tough for decades.
At nearly 39 (birthday 13 February) Rossi has has the drive and passion to take on the rest of the world. The number of riders that have come and gone over his 23 years would fill a grid three times over.