The plastic shirt collar was patented in the US by Walter Hunt.
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Maximilian II became emperor of the Holy Roman Empire.
The first baby was born after being conceived by in vitro fertilization (IVF).
Verizon bought Yahoo for $4.8 billion in cash.
An asteroid, dubbed 'City Killer,' came closer to Earth than the moon and was almost undetected.
Wikileaks published classified information about the war in Afghanistan.