1. Evolution | SECURE › |

Fin lay in the shallow, sun-warmed tide pool, a world of safe stone and predictable currents. But the water was receding, and the oxygen was thin.

He reached the next pool just as the sun began to bake the mud. He survived. 1. Evolution

It was a clumsy, agonizing shove. His body felt heavy, a weight he’d never known in the buoyancy of the deep. But with each lurch, his gills strained to pull life from the damp air, and his fins held firm against the earth. Fin lay in the shallow, sun-warmed tide pool,