We begin learning about evolution from a young age, first taking field trips to look at dinosaur bones and eventually learning that we, as humans, are the product of many years of changes and adaptations to early life forms. Understanding these changes can be enough to wrap your head around, but understanding why they happen is pretty impossible — or at least it was before a recent video from PBS Digital Studios' "It's Okay To Be Smart."

The video wonders, is there a "point" to evolution? Is there a reason some life forms have remained constant for many years, while other seem to evolve rapidly? What about the differences between species?

Dr. Joe Hanson, the host of the PBS video channel, explains one idea involves humans and an ancient fish called the coelacanth. A 66 million year old fossil led experts to believe coelacanths died out, Hanson said. Recently, though, a live coelacanth was discovered in the ocean — one that has barely changed since the time of the dinosaurs.

In contrast, Hanson explained humans have evolved in numerous ways from our beginnings, with many more abilities and functions than the coelacanth. But, through an evolutionary lens, humans aren't necessarily better.

Check out the video to learn more about what determines success in evolution, and whether or not there is any end point in sight for the phenomenon.