Scientists at Arizona State University have created Möbius strips... using DNA. Because that's awesome, and for no other reason.
Actually, they did it as a test and demonstration of DNA self assembly; "not only because it is artistically inspiring, but also because it will likely display unique material properties that may be applied to create novel molecular devices."
Each strip is about 210 nanometers long, 30 nanometers wide, and eleven helices across.
Read on...