Rob Cockerham and his brother Mike use a super-powerful magnifying toy (Eyeclops) to count the individual threads in some $40 Martha Stewart Collection 360 thread count pillowcases. They wanted to answer the questions, "Are there really 360 threads per square inch?" Link (See other How Much is Inside" experiments here.)
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. Come and hear Mark speak at the ALA conference in Chicago on July 1.