during his long career, sir david attenborough has seen first—hand some of the most extraordinary natural phenomena. there's more meaning and mutual understanding in exchanging a glance with the gorilla than any other animal i know. but he has also lived through the most profound changes in the natural world in human history. his latest film contains the stunning images you'd expect from an attenborough production, but this is not a celebration of the incredible diversity of life on earth. this is a warning. the natural world is being destroyed more rapidly than ever before. what's different is that it is happening simultaneously in the amazon,