What happens when your grandparents can talk to your grandchildren

Between Facebook and the cloud, it’s realistic to expect that thousands of photos and videos of us will exist forever. Future generations will have a better window into the everyday lives of millennials than humans have had for any generation in history. That change is dramatic, but could be just the beginning of a revolution in remembrance, given the world sketched out by Martine Rothblatt in her new book, “Virtually Human: The Promise and the Peril of Digital Immortality.”