Beloved broadcaster and naturalist Sir David Attenborough is celebrating his 100th birthday.

Time to test your knowledge: how closely have you been following his life and career?

Quiz collated by Rosemary McCabe and the Special Projects team.

A century celebrated:Β On the eve of his 100th birthday, Sir David Attenborough has a message for his fans.

The legendary wildlife broadcaster thanks fans in a message the day before he reaches his centenary.

Despite the 94-year age gap, six-year-old Max Evans-Browning calls Sir David his "favourite person".

Dudley Zoo says the acclaimed broadcaster has "opened our eyes to the wonders of the natural world".

Fossils fascinated Sir David Attenborough throughout his childhood. The BBC retraces the steps of Sir David's formative experiences roaming the British countryside.