How do you follow a trail more than 200 years old, when even the maps they used uncertain? You look for specific historical deposits. And famed explorers of the Louisiana Purchase, Lewis and Clark, made some very unusual ones.
A new material relies on millions of tiny plastic fibers that can grip solids as the fabric slides across them, then quickly release those objects when pulled away vertically. The technology is based on the anatomy of a
spider's gecko's foot, and may be used for things like hanging art on a wall, or wrapping a broken…