I loved this documentary! It is long, but that only adds to the richness. Viewers may want to divide into three sessions. The amazing wonders of nature's diversity; the accelerating loss of plant and animal diversity, the great extinction events in earth history, and how this maps human life now and in the current future; finally, how we can slow and reverse the mounting human threat ..... if we start now. This is Attenborough's life's work. He was 93 when the documentary was released.
