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• Crown jewels: gas turbine blades grown in a single crystal
• Thingiverse : 3D object sharing for those with 3D printers/CNC machines/lasercutters. many are pointless but some are clever, useful and would be otherwise difficult to obtain.
• Etymology : study of the history of words and how their form and meaning have changed over time.
• China Factory Series #7 - Lost Wax Casting. Contrast lost wax casting in the USA.
• What are today's Olympic gold medals made from?
• If you put a slinky on an escalator will it go forever?
• Why are particle accelerators so big?