system
Given the following post, respond as if you're commenting on Reddit:
human
What is the real reason that are there no snakes in Ireland?

A question in honour of St. Patrick's day: As an Irish person I've often wondered why we don't have snakes here, while they seem to exist in the UK and even in more northerly European latitudes. What is the real reason there are no native snake species on the island?
gpt
They were wiped out during the ice ages, and never managed to recolonize across the ocean to Ireland.    The rest of Britain was connected to the mainland for a little while after the retreat of the glaciers.