So geologist Fernanda Avelar Santos was startled to find an unsettling sign of human impact on the otherwise untouched landscape: rocks formed from the glut of plastic pollution floating in the ocean.

Rocks are big in landscape design, and big rocks in a landscape are huge. Rocks add drama to the garden; their mere size and surface -- chiseled or weathered -- create a sense of timelessness and ...

So geologist Fernanda Avelar Santos was startled to find an unsettling sign of human impact on the otherwise untouched landscape: rocks formed from the glut of plastic pollution floating in the ocean.