The Crystal Egg by H.G. Wells

A shopkeeper discovers a mysterious glass egg that seems to show scenes from another planet—revealing what appears to be life on Mars. As he observes the strange landscapes and beings within, he becomes obsessed with understanding its origin and meaning. Others begin to take interest, and the egg’s true significance remains uncertain. The plot is quiet but eerie, filled with mounting tension. It’s an early example of interplanetary observation and cosmic mystery.