Six tenths of a second. It's a long time in motorsport, but think about how long it really is. This was the margin - 0.636 seconds to be precise - that separated Lewis Hamilton from Nico Rosberg at the end of the Spanish Grand Prix. Next to nothing.
Those two thirds of a second mean that Rosberg no longer leads the world championship, with the pendulum swinging ominously towards Hamilton thanks to four consecutive wins. It means the world to Hamilton, or at least it will if he's still ahead after 14 more races.
But as a measurement of time to human perception, it's not much more than the blink of an eye. So where did those six tenths come from?