Symbiotic Relationship

In science, it is taught that a symbiotic relationship is coexistence between two organisms that is beneficial to both. Meaning it's a win-win situation however you look at it.

In the wild, there's a bird called the small heron. It, among other wild birds, feeds on the bugs of water buffalo, picking off and feasting on plump fleas, ticks, mosquitoes and other parasites. In this harmonious relationship, the bird gets dinner and the water buffalo is cleansed of annoying pests. No one is harmed and both creatures are happy to have their symbiotic partner.

However, some symbiotic relationships are more serious, more demanding. If one partner in the relationship dies or leaves, the other is affected greatly, possibly even dying due to the loss of their symbiotic coexistent. This is called grave symbiotic coexistence (GSC for short but it's not exactly a cool acronym like DNA or ATP). This kind of relationship is rarer, but can be found in many different biomes, ecosystems and among multiple kinds of organisms. Humans included.

But one instance in particular stands out beyond the numerous other cases. This once instance of GSC was so strong, so necessary, that not even death was able to break it apart. GSC is an old phrase, changed and revised or altered so often, so this case was lost to observers and scientists, no longer recorded. But it existed - still does. A perfect symbiotic relationship, existing and surviving, throughout time.