Over the last couple months, Pixiv artist Kurosshu has been posting a series of interconnected collages tracking the history of anime's mecha from Astro Boy and Gigantor to Nano Shinonome and Gundam AGE.
click on the links for larger versions
The beginning through the 70's - 41 featured

1980's - 83 featured

1990's - 110 featured

2000's - 100 featured

2010-2012 - 36 featured

throughout history - 400 featured

via @kraker2k
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Scott Green is editor and reporter for anime and manga at geek entertainment site Ain't It Cool News. Follow him on Twitter at @aicnanime.