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Greatest Inventions |  |
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See the Science section for more instructions, hints and tips.
Consider the impact that these have had on our lives. Almost every one of them have an impact on our lives every day.
| Invention | Year |
| Fire | 1,700,000 years |
| Ceramics | 8000 BC |
| Wheel | 3500 BC |
| Copper | 3500 BC |
| Nail | 3300 BC |
| Decimal Number System | 3000 BC |
| Candle | 3000 BC |
| Glass | 2500 BC |
| Ink | 2500 BC |
| Alphabet | 1600 BC |
| Kite | 1000 BC |
| Button | 700 BC |
| Coins | 650 BC |
| Soap | 600 BC |
| Screw | 500 BC |
| Pulley | 400 BC |
| Concrete | 300 BC |
| Books | 100 BC |
| The Number Zero | 100 |
| Paper | 105 |
| Gunpowder | 900 |
| Paper Money | 1000 |
| Compass | 1100 |
| Lenses | 1280 |
| Printing Press | 1450 |
| Toothbrush | 1498 |
| Calendar | 1582 |
| Thermometer | 1592 |
| Microscope | 1600 |
| Timepiece - clock, watch | 1656 |
| Cotton Gin | 1793 |
| Vaccines | 1796 |
| Battery | 1800 |
| Bicycle | 1818 |
| Matches | 1827 |
| Telegraph | 1832 |
| Electric Motor | 1834 |
| Rubber | 1839 |
| Refrigerator | 1842 |
| Anesthesia | 1844 |
| Steel | 1856 |
| Combustion Engine | 1859 |
| Plastic | 1862 |
| Telephone | 1876 |
| Sound Recording | 1877 |
| Light Bulb | 1879 |
| Camera | 1888 |
| Automobile | 1889 |
| Moving Pictures | 1891 |
| Radio | 1896 |
| Airplane | 1903 |
| Radar | 1904 |
| Assembly Line | 1913 |
| Television | 1923 |
| Rocket | 1926 |
| Penicillin | 1928 |
| Jet Engine> | 1930 |
| Computer | 1939 |
| Cell Phone | 1946 |
| Integrated Circuit | 1958 |
| Laser | 1958 |
| Calculator | 1967 |
| Internet | 1969 |
| GPS | 1973 |
| Personal Computer | 1974 |
| World Wide Web | 1989 |
| Google Search Engine | 1998 |