Wired's Top Human Innovations

This is a current story in Wired Magazine about top innovations. I'm introducing the advent of fire in class tomorrow, hence my discovery of this list. From whence they got some of these dates, I know not!
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Changing the world is simple: It takes just one groundbreaking idea, one novel invention, even just a really stellar upgrade. As the timeline below shows, each new innovation builds on the last in a snowball of technology that, over millennia, has transformed us from creatures at nature's mercy to active shapers of our world. The astounding thing is that this process has no end. The richness of physical reality and the subtlety of human imagination ensure that somebody, somewhere, will always come up with something new.

INNOVATION TIMELINE

BC ---
400000 Domestication of fire
35000 Counting
8000 Stone tools
3500 Wheel
3000 Astronomy
1000 Greek alphabet
320 Botany
300 Euclidean geometry

AD --
50 Medicine
100 Steam power
876 Zero and decimals
1202 Algebra
1435 Perspective (in art)
1439 Printing press
1543 Anatomy
1600 Magnetism
1673 Microscope
1774 Combustion
1796 Vaccines
1799 Electric battery
1808 Atomic theory
1820 Electromagnetism
1822 Difference engine
1828 Synthetic matter
1859 Evolution theory
1860 Carbon-filament lightbulb
1867 Dynamite
1869 Periodic table
1876 Telephone
1885 Gas-powered automobile
1895 X-ray
1896 Radioactivity
1902 Biplane glider
1903 Chaos theory
1905 Special relativity
1910 Antibiotics
1915 General relativity
1928 Penicillin
1942 Nuclear fission
1943 Artificial intelligence
1946 Computer
1947 Nuclear energy
1947 Transistor
1953 DNA structure
1959 Nanotechnology
1969 Apollo mission
1973 Genetic engineering
1977 Cryptography
1973 Genetic engineering
1977 Cryptography
1984 String theory
1990 World Wide Web
1996 Mammal cloning
2000 Human genome
2001 iPod
2005 YouTube

You can add to the list and/or vote for other innovations making the list at: http://www.wired.com/culture/geekipedia/magazine/geekipedia/innovation