… well obviously, without the sign we don’t know whether 1 ÷ 0 is +∞ or –∞ 
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Follow-up:
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Can’t build a truck, but is going to Mars. 
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We have a forecast of rain…
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… maybe they can put a rotating crankshaft down the middle of the space elevator 
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Saturday Morning Breakfast Cereal - Paper
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I’ll have a comic update in a minute but I thought you might enjoy this paper I was involved with. Click to read - it’s available online for free.
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We present an overview of the thermal history of the Universe and the sequence of objects (e.g., protons, planets, and galaxies) that condensed out of the background as the Universe expanded and cooled. We plot (i) the density and temperature of the Universe as a function of time and (ii) the masses and sizes of all objects in the Universe. These comprehensive pedagogical plots draw attention to the triangular regions forbidden by general relativity and quantum uncertainty and help navigate the relationship between gravity and quantum mechanics. How can we interpret their intersection at the smallest possible objects: Planck-mass black holes (“instantons”)? Does their Planck density and Planck temperature make them good candidates for the initial conditions of the Universe? Our plot of all objects also seems to suggest that the Universe is a black hole. We explain how this depends on the unlikely assumption that our Universe is surrounded by zero density Minkowski space.
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