1. Despite the fact that polar bears are generally solitary, they gather annually in places like the city of Churchill in Manitoba, Canada, where they congregate together prior to the freezing of the sea ice. When they gather in groups like this, the group is called a "Celebration."
4. From wing tip to wing tip, Hatzegopteryx measured an astonishing 46 feet!
9. Speaking of poop, fossil poop is known as a "coprolite."
13. Hopping, the method of locomotion preferred by the kangaroos, is actually much more efficient than walking. Of course, this is only the case if you have evolved in that fashion. It wouldn't just be more energy efficient if we started hopping around everywhere.