They sort left from right versions using circularly polarised light, whose electric field corkscrews through space in a left or right-handed direction.
It would be difficult for anyone not to pick up something or other: old keys, corkscrews, cups and saucers, hickory-shafted golf clubs or a lace tea-tray mat (&15 or 201 Renminbi).
Each level is large and has a great sense of scale, with huge dinosaurs, pirate ships, corkscrews, loops, and other structures to run on.
As a result, bacteria have developed a unique way of swimming: using tiny rotary motors called flagella, which resemble corkscrews.
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