Thinking back, they’re like god, though never worshipped. How could this friend be by our side for so long?

From the center I spread, The same roots but differently-led. A division that multiplies, My name also describes my action.

If you are too lazy to solve this riddle, you may be exhibiting a deadly sin. The giant ground ones went extinct ten thousand years ago.

I don't have scales, but a thick, smooth skin. I like swimming with your boat, on my face a big grin. I slice the waves with my back fin and jump out of the water with my kin.

I have a crest but no head, I have a bed but never sleep. I can travel thousands of miles, Yet I never take a single step. I can be made by a hand, a sound, or a stone, But I am nothing but energy moving alone. What am I?