Did you know that the hairs on your body help to regulate your body temperature? Or that you currently have nine organ systems working hard to keep you alive?
Many people think it is presumptuous to address the reader directly like this. I guess I sort of agree. Especially in a world full of so much advertising that does the same thing, it might be better to write this about yourself instead:
I was astonished to learn that....
The last sentence of the first para and the first sentence of the 2nd para say very similar things... and what they say is not so important! In this area, at the transition from the first to second para, it is good to give a sentence that captures the meaning of the whole essay in a single sentence. Or tries to, anyway.
Consider giving a sentence like that, and then, as you complete your conclusion, remember that the conclusion should ALSO capture this main idea, and it should discuss it over the course of a very interesting paragraph.
:-)