Throughout history, biology has continuously invented new ways of more efficiently using untapped reservoirs of energy, ultimately derived from sunlight hitting the earth. One way to capture this solar power is photosynthesis in plants. Another way to capture it is to eat the plants that store that solar power in their leaves as sugars. Still another way is to eat and digest the mouse that eats those plants, shunting the solar power even higher up the food chain. But at root, it’s all about capturing the energy from photons streaming off a star exploding 93 million miles away in outer space.
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