Your face at every age
Time Machine shows one person at nine points in life — toddler, child, teenager, twenties, thirties, forties, sixties, eighties — generated from a single photo and kept consistent in gender, features and the shape of the face. It is equal parts funny and slightly unsettling, which is why people send it to their parents.
What it is good for
Birthdays with a round number. Reunions. The "look how far you have come" post. Teachers use it in classrooms to talk about ageing. The two most-printed cells are the oldest and youngest, usually stuck side by side on a card.
Accuracy and limits
The model keeps your identity but it is guessing at the ages you have not reached. Hairline, skin and weight are extrapolated from the one photo, so the eighty-year-old version is one plausible future, not a prediction. The youngest cells are the most reliable; the oldest are the most fun.