Why soda bottles have gaps in their threads (2000)
My country's national library used to provide a service in the 70s/80s where you could send a letter or telegram with a question, any question, and they'd do their best to answer it.<p>My Mum was a big fan of it, I've still got a copy of their telegram response to her question of "Why don't we see birds flying overhead with a penis flopping around?"<p>The answer was simple.<p>"Most birds don't have penises. They press cloaca to cloaca. Birds that do have penises store them in their bodies when not mating. Please stop sending questions about penises"<p>...it wasn't her first animal penis question submitted, and I'm assuming she'd developed a reputation.