Transmissions through time: the 2017 advent calendar
Day 20


Sir David Attenborough demonstrates how bioluminescence occurs in animals.

Many animals, especially insects and deep sea marine species, produce light to send signals to those around them. This is called bioluminescence. In this clip from the 1973 CHRISTMAS LECTURES "The languages of animals", Sir David Attenborough performs simple chemistry to show how some animals put on these vibrant displays.

Sir David Attenborough gave the 1973 CHRISTMAS LECTURES "The languages of animals". This clips is from his fifth lecture "Foreign languages".