Evolution of Formula 1

BBC Sport charts the evolution of Formula 1 from it's beginnings as a European series in 1950 to a global event in 2013.Helmets were first introduced for drivers in 1963, while seatbelts were only made mandatory in 1972.

The second Formula 1 race of the 2013 season takes place in Malaysia on Sunday, with Kimi Raikkonen victorious for Lotus in the season-opener last weekend in Melbourne, Australia.

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