How many times have we pondered about simple things in life that Allah has created , no man can recreate even a fly. Even a walnut. I saw one in the park a few days ago, it was all ripe. A soft cover underneath which there is a hard cover, which protects the soft nut. Because of the presence of the soft part, the shell of the walnut ( and many other nuts) are un scratched, clean and clear. SubhanAllah!!!