And then something wild starts to happen: a dazzling diversification of life into multi-celled forms during a geologically brief time period that scientists call the Cambrian Explosion.

• 接着便有不可思议的事情发生了，在科学家称作“寒武纪爆发”的短暂地质时期内，生命具有了令人目眩的多样化，进入了多细胞形态。