在莎拉(Sarah)生日那天,她最好的朋友维多利亚(Victoria)给了她一套基因检测试剂盒作为礼物,以便她可以更多地了解家人的血统。但是那天晚上,维多利亚被惨死了。几周后,莎拉敲了敲门,是警察。。In 2016 filmmaker/photographer Pete McBride and writer Kevin Fedarko set out on a 750-mile journey on foot through the entire length of the Grand Canyon. More people have stood on the moon than have accomplished this task. Their quest was more than just an endurance test — it was also a way to draw attention to the unprecedented threats facing one of our most revered landscapes...。