Is it normal for someone to learn about death and lif at an early age?

I learned about life and death when i was like 4. i had raised a little grashopper till he was bigger (or captured it something like that) and i remember i opened my hands to let it go, it flew away, it was flying away and when it reached about 4-6 feet away from me a bird swooped down, plucked it out of the air and few away and i was curious about it and i believe i realized that the grasshopper fed the bird so that the bird could live; and that it had only witnessed 2 secs of freedom after a little child captored it from it's hoome....So is it normal to learn about life n death at htis early of an age?