“I was doing a reverse one and a half and hit the board, shattering toes and joints,” Spencer wrote in her Wednesday post.

His health issues continued in 2018 when he was diagnosed with systemic sclerosis, a chronic disease characterized by diffuse fibrosis and vascular abnormalities in the skin, joints and internal organs.

Each finger has three joints, like a human finger, and the angle and degree of bending are determined by the design on the DNA scaffold.

Mr Tooth has been using a wheelchair for the last four years after a rock climbing accident triggered an autoimmune disease which affects his joints.

Using cutting-edge computer animation software, they combined the videos with 3D models to visualize how the bird's bone surfaces fit together geometrically and how those joints appeared in motion.