Throughout history, two entities have perfected the art of not being bothered: the humble hedgehog, with its arsenal of approximately 5,000 keratin spines, and the ninja, Japan's legendary shadow warriors whose very existence was once disputed by historians. Both operate under cover of darkness. Both possess specialised defensive capabilities. And both have somehow achieved global cultural recognition despite fundamentally preferring to remain unseen.
This investigation applies rigorous scientific methodology to a question that has troubled precisely no one until this moment: which represents the superior survival strategy?