{{TODO}} {{β:1+0}}
{{TODO}} Return after studying some [Trigonometry] {{r/moved}}* {{r/moved}}
{{TODO}} Finish taking notes on Speed:wikipedia {{β:1+0}}
{{TODO}} Read this paper.
{{TODO}} Check out null directions in space-time.
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{{TODO}} Finish reading this essay. {{β:1+0}}
{{TODO}} Define this {{β:1+0}}
{{TODO}} Read this paper. {{β:1+0}}