Editing Category:Time traveling Sphere

In this series we are introduced to the time traveling Sphere, a floating black energy sphere from the future. It speaks fluent English and seems to come from very far into the future and it calls Earth "your planet" so seems like it did not originate on Earth (or else came back). See more about these strange things in the explanation for the comics.

A similar talking floating energy sphere was seen before in [[1173: Steroids]]. And the AI in [[1450: AI-Box Experiment]] is similar except the central part was star shaped. The Steroids sphere could be a different time traveler or aliens race or even AI, but the AI from the AI-Box seems unrelated to the other two spheres.

*It is a rare type of series not seen before in xkcd. 
**'''Click''' to expand for a more detailed explanation:
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==Explanation==
The two comics came out in consecutively released comics, but not two days in a row, but in the regular release schedule Monday and Wednesday, but then stopped there. Other "real" series where more than one comic in the series came out in the same week always came in groups of five with five releases in a week, one every regular weekday.

The comics in the ''Time traveling Sphere'' series have titles that do not relate to each other, except the fact that both comics titles are a noun followed by a field of research that refer to sciences that look into the past with {{w|Paleontology}} and {{w|Archaeology}}. Only other clear series with such differing names are the [[:Category:Android|Android]] series, but those two comics were not released in the same week (although within two weeks of each other), and the word Android goes again in both comics binding them together. In the ''Time Traveling Sphere'' only the Sphere and the fact that [[Cueball]] and [[Megan]] continues their discussion with it from the first comic in the second comic makes it clear that these two comics are a series. 
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[[Category:Comic series]]
[[Category:Time travel]]