This is a great documentary created by experienced people in their profession. Everything from directing to cameramanship is done so professionally tasteful, except the choice of narrator which has a bad voice, tone, and accent for this particular job. Perhaps, I should not expect the velvet voice and the theatrical tone of David Attenborough for this film as it may have been produced to be appealing to children as well as adults. But the Narrator's voice was simply bad for the job and almost unbearable for me. He narrates with a sort of an American childish accent. Thanks for the great film though!