There are approximately 1.4 billion iPhone users worldwide and more than 3 billion Facebook users. In the next few decades, many of those users will die, leaving behind vast amounts of precious data. What happens to all of it?

Merle was smart, obedient, and always up for an adventure — the kind of dog you can take anywhere. But even the most cherished dogs grow old. A friend suggested that essayist Sarah Miller get a “bridge dog" — a young dog who might make Merle’s impending loss easier to bear.