Bangladesh, Sept. 9 -- Artificial intelligence has sparked a nostalgic wave of people recreating themselves in 1980s style, complete with fluffy hair, denim jackets and vintage studio lighting.

Scroll through Facebook, Instagram or TikTok these days and instead of familiar modern selfies, friends' timelines are filling up with retro high-school yearbook-style portraits straight out of the decade.

Psychologists and sociologists have a name for this shift: "digital nostalgia travel", a trend that has become something of an obsession among younger users.

What looks like a harmless filter game, technology and behavioural experts say, actually taps into a deeper psychological void, and some clever design by the platforms themselves.

The p...