September-December 1999
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September-December 1999 |
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| September-December 1999 | |||||||||
| September 7: | Plastic bottle | ||||||||
| September 14: | Pop can top | ||||||||
| September 21: | Television | ||||||||
| September 28: | Power outage | ||||||||
| October 5: | Nylon | ||||||||
| October 12: | Bathtubs | ||||||||
| October 19: | Microchip and dancing | ||||||||
| October 26: | Roman engineering | ||||||||
| November 2: | Stall warning | ||||||||
| November 9: | Theremin | ||||||||
| November 16: | Zara Witkin | ||||||||
| November 23: | Typefaces and bolts | ||||||||
| November 30: | Tunnels | ||||||||
| December 7: | Wind-up radio | ||||||||
| December 14: | Razor | ||||||||
| December 21: | VCR | ||||||||
| December 28: | Digital data | ||||||||
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