This sea creature turns into a baby when it's stressed out — but is it reverse aging?

Norwegian scientists say the sea walnut has the rare ability to develop in reverse — but not everyone’s convinced.

This sea creature turns into a baby when it's stressed out — but is it reverse aging?
The outline of a transparent, jellyfish-like creature, peppered with colourful spots of light, against a black backdrop.

Norwegian scientists say the sea walnut has the rare ability to develop in reverse — but not everyone’s convinced.