Complex sentence: Speaking of his move from television to radio, Attenborough remarked that "it's a chance to talk about fossils, archaeopteryx" and other subjects close to his heart, including his first pet, a salamander, and his favourite animal-the bird of paradise.
Split into simpler sentences: Speaking of his move from television to radio, Attenborough remarked that It's a chance to talk about fossils, archaeopteryx "and other subjects close to my heart." These included his first pet, a salamander, and his favourite animal-the bird of paradise.