The fact that there are still mysteries in the world makes me happy.  Take the trilobite beetle, for example.  This odd (yet very cool looking) insect is so rare that scientists know very little about it.

The tail on the female trilobite beetle is fascinating to me.  And the fact that the male of the species is so hard to find could be because they are terrified of the female and are just really good at hiding...

Video uploaded by National Geographic on November 1, 2016.

More cool animal videos can be found here!