(EDITOR’S NOTE: Call Me Stormy has been in existence nine years now, and we have made 15,000 posts. To celebrate these milestones, today we re-publish our top 10 posts as measured by their popularity with our readers. We begin with No. 10 and will work our way up to No. 1. All of these posts have more than 900 views each, the best nearly 50,000. Here’s No. 9, originally published Sep. 8, 2014.)

There are many lifeforms strewn across the planet that still–in this day and age of technological excellence–baffle scientists. Hybrid Librarian takes a look at 10 of these conundrums that have our best minds scratching their noggins.