Secrets Of Bones

Confirmed for BBC Four on 4 March at 8.30pm to 9.00pm

Ep 3/6

Tuesday 4 March



In the third episode, Ben Garrod looks at vertebrates that have taken to the skies. Across the animal kingdom, many species have historically had a go at getting airborne, but only a few have truly mastered the art of flight.

Ben uncovers the unique and fascinating characteristics of bird bones that have made them such successful fliers. He reveals how their limbs have evolved from the five-fingered blueprint and, through reduction and fusing, have developed into rigid, strong but incredibly lightweight structures that have enabled them to take to the air.

Ben investigates the skeletons of flightless birds by sawing open the thigh bone of an ostrich. He also discovers how the wings of bats make them so manoeuvrable and why some birds have heavy bones.