If you ever find a pseudoscorpion around your house, don't worry! These tiny arachnids, which range from a mere 2 to 8 millimeters (.08 to .31 inches) in size, are harmless to humans. While they have pincer-like claws reminiscent of a scorpion's, pseudoscorpions lack a stinger. They’re sometimes found in sinks and bathtubs, but they’re also known as “book scorpions” because of some species’ affinity for old books. Many old tomes contain booklice and dust mites, which are a few of pseudoscorpions’ favorite snacks!
Photo: Nikolishin Roman