For more than 70 years, British broadcaster and naturalist, Sir David Attenborough has brought nature to our screens.At 100, he reflects on one unforgettable moment - coming face to face with mountain gorillas in Rwanda.Here’s that encounter from 1979.

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🦍One of Sir David Attenborough's most memorable moments? This encounter with a group of playful mountain gorillas in Rwanda in 1979.Happy 100th birthday Sir David! 🎉🎧 https://t.co/KQKcBnyF3P