Science

Biosphere 2 was built nearly thirty years ago to develop technologies for human living in space and on other worlds. Eight biospherians survived sealed inside the engineered ecosystem for two years. The results of the mission were mixed, but they definitely succeeded in constructing a research facility like none other in the world.

In Elkhorn Slough, an inlet on the California coast, seagrass grows healthy and strong in the shallow water, providing homes for fish, preventing erosion, and trapping carbon from the environment.

This healthy seagrass baffled marine biologist Brent Hughes. Water in the slough is chock-full of nutrients from fertilizer runoff on nearby farms. Normally, nutrient-polluted water supports huge population of algae that block sunlight from reaching the seagrass, and the seagrass dies. Why has the slough's seagrass thriving?