Chlorophyll

It really is magic if you think about it.

In high school biology it seemed pretty simple... green chlorophyll converts light into energy.

But when you read about how that happens you come across phrases like "resonance energy transfer" and "electron transport chain" and "chemiosmotic potential." Suddenly you realize it is really complicated. Seemingly a miracle.

Without that extraordinary pigment we would not exist, nor would any life on Earth as we know it.