Timehop started it all. Facebook’s On This Day feature followed suit. #ThrowbackThursday is a regular feature on social networks every, well, Thursday. Now, Google Photos is doing its part to bring you nostalgic feels by giving you a trip down memory lane. The opt-in feature will show you photos taken from a year ago, two years before that, and even as long as ten years back, as long as they are backed up on the app.