One of the most radical reinventions in evolutionary history

One of the most radical reinventions in evolutionary history

Few transformations in the history of life have been as extreme as the embrace of the ocean by seagrass. Like whales and dolphins, modern seagrasses descend from land-dwelling ancestors. But marine mammals surface for air. Seagrasses often live entirely submerged. Why did they take the plunge, turning their back on the land to become sea creatures? The world’s continents are fringed by vast expanses of sand and mud. Until seagrasses came along, …