Do sea urchins really live forever?

Today I shall be wasting my time at the Museum of Hoaxes, where I was searching for Jonathan Swift's 'A Modest Proposal' (a fantastic piece of satire where Swift suggests that farming babies as an alternative source of meat would help to eradicate poverty) but they didn't have it and now I've got carried away...

( Extracts from 'A Modest Proposal' )