David Attenborough embarks on a remarkable 500 million-year journey revealing the extraordinary group of animals that dominate our world, and how their evolution defines our human bodies.陈天豪挥(huī )舞(wǔ )着蓝色的翅膀，像(🙀)一个蓝色天使一般，在空中快速(sù )的飞行。