Life

Exactly 5 years and 1 month ago my son started his experiment. He put a few plants in a jar, watered them and then closed the lid.
It has never been opened since and left on the top part of the windowsill where it gets very hot in the summer and cold in winter.
Each year the ecosystem changes ever so slightly, but it is still going. Each part feeding from the other and some plants more successful than others. So far the mosses and algae, which were not intentionally planted at the start, have succeeded.