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When	What	Who	Comment
15 seconds ago	History - Europe - Medieval (list) - diff	Brent J. Unger	Added The crucial centuries to the list.
18 seconds ago	RG-PB-2A (list) - diff	nomayo	Added How I Breathe (I'm Alive) to the list.
1 minute ago	RG-PB-2A (list) - diff	nomayo	Added Levers to the list.
1 minute ago	RG-PB-2A (list) - diff	nomayo	Added Pulleys to the list.
1 minute ago	RG-PB-2A (list) - diff	nomayo	Added Wheels and cogs to the list.