I have a small marine reef aquarium. Without getting too nerdy over the whole thing, it's a small tank of seawater with rocks, invertebrates, corals, and fish. I started it by ordering something called "live rock" from a
website. The rock comes wrapped in wet newspaper and you place it in the aquarium with some seawater, and wait for about six weeks. It's worth it, trust me.
The rock comes from Fiji, and is obviously volcanic. It has a mottled pink and gray color, and it looks like...well...rock. Not very exciting.
After about three weeks, the pink and gray is broken up with some green and brown. Algae starts to grow. Actually, the original pink is algae also. A very tough strain that survives shipping from Fiji. If you have the water chemistry right, the green and brown algae are short and slow-growing. After six weeks, the rock is "cured" and you can start to add corals.
An amazing thing happened about eight weeks or so after I started all of this. I was looking into the aquarium one day, and I noticed a little tube sticking out from one of the rocks. It had obviously not been there when I got the rock, it was too small and fragile. As I watched, a small, feathery fan unfolded from the tube. It was a feather duster worm.

I was astonished. I had not put the thing in there, but there it was. In all honesty, I shouldn't have been so amazed. Anyone who has been through high school biology knows about flatworms. If you cut a flatworm into ten pieces, you get ten flatworms. Worms are amazing resilient creatures.
As I continued to look, I also noticed some small, white polyps waving in the current. More amazement. I still don't know what they are, though I suspect they are some kind of small coral or anemone.
Now, six months later, I have added several corals, some crustaceans, a few snails, and some fish and the tank seems to be thriving. I look in there and see a number of things growing that I didn't add. Lemon sponges, lots of feather duster worms, some other kind of worm that sends out a single, long filament that is sticky and traps particles floating by in the current, and most amazing of all, clams. I have about half a dozen small clams at various places on the rocks and coral.
Life is amazing. Some would look at all of this and see a vindication of science, and I guess that's valid, but I can't help but notice the hand of God. I'm just saying...