Please check my writing?

There is a story going like this:
Someone asks:"What is the strongest thing in the world?" Responses vary. Some say "elephant" and some "lion". Even "King Kong" is mooted in joke. Because no one konws how strong a "King Kong" is.
In the end, none of these answers are correct because the it is the plant seeds that are the strongest on earth. A single seed can display such strength as surpass any other things, where comes in a another story.

Human skull is natural born intensive and sturdy. Physiologists and anatomists adopt all possible means to dissect it with all their mighty, but they failed. Later on, some one devise out of the blue a method that is to plant some seeds into the cranium to be dissected. If administered favorable humidity and temperature, they can, with dreadful power, sprout, crack and separate the skull on the nose which is otherswise unbreakable under physical strength. Such is the strength of plant seeds.

Well, this example is a bit peculiar, common people can't get their head around it. Then, have you ever seen how bamboo shoot grow? Have you seen how grass grow under the rubbles and rocks?

Yearning for the sunlight, the grass seedling must zigzag its way both upward out of the earth and downward into the soil, tenaciously, for its will of living. What the grass demonstrates is an unstoppable force, turning over those stones which weigh upon it. Such is the strength of a seed.

No one would call a grass seedling "Hecules". Yet it does possess an unrivaled strength. This strength, invisible to ordinary people, can manifest itself as long as its life exists. The stones covering the grass is no match for it, for it is an enduring strength of resilience, flexibility, and tenacity, one which is bent on achieving its purpose.

Seeds, which happen to fall into a pile of rubbles rather than fertile soil though, would never sigh for its lot nor feel sorry for themselves because they covert the struggle through the setbacks. Grass seedlings which are born into this struggle for life are tenacious by nature. And it takes the grass of this kind to pride itself in its tenacity in face of those potted ones growing in the glasshouse.

Tahnk you in advance.