Find the answers to some of the world’s most interesting questions with these curiosity-inspiring series.

How To

Composite propane cylinders; salsa; water-pumping windmills; dragsters.

How It's Made

Dial thermometers; hummus; spent fuel containers; straw sombreros.

Digital dentistry; nail clippers; poster restoration; canola oil.

Clay; liquor jugs; deli meats; NASCAR engines.

Kitchen accessories; vacuums; paper mache; hydraulic cylinders.

Audio vacuum tubes; shredders; wood model aircraft, metal snare drums.

Surgical instruments; ketchup; double decker buses; walking sticks.

Needles & pins; architectural mouldings; locomotives; clothespins.

Cast Iron cookware; biodiesel; clothes hangers; stone wool insulation.

Straight razors; black pudding, steering wheels; inorganic pigments.