There is a branch in the social sciences called garbology. Its research relies on the principle that many of our habits and secrets can be found in wastebaskets and trash cans. Discarded items can open a window to someone's finances, love life, medical needs and family foibles, as well as indulgences and bad habits.
Trash might be civilization's most lasting accomplishment. More than sacred texts, beautiful temples and monuments, or great works of art and music, man-made plastic promises to survive nuclear wars and global warming. According to David Ferris, a writer for Sierra magazine, scientists are learning that minute elements of plastic seem never to completely disintegrate. Nurdles, the basic components of plastic, are now found in the digestive systems of fish, in the nests of hermit crabs, in the excrement of fur seals. Should aliens descend upon this planet in a millennium or two, they will infer that an intelligent species once inhabited the place - not from such as evidence as museums and libraries, but from nurdles sparkling in dung heaps and animal dwellings.
