Randall Munroe What If Series 2 Books Collection Set What If2 Additional Serious

Randall Munroe What If Series 2 Books Collection Set What If2 Additional Serious

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Randall Munroe What If Series 2 Books Collection Set What If2 Additional SeriousDescription: Condition: BRAND NEW Format: Mixed lot What If? : Serious Scientific Answers to Absurd Hypothetical Questions From the creator of the wildly popular xkcd. com, hilarious and informative answers to important questions you probably never thought to ask. Millions visit xkcd. com each week to read Randall Munroe's iconic webcomic. Fans ask him a lot of strange questions: How fast can you hit a speed bump, driving, and live? When (if ever) did

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Reviewed in the United States on March 2, 2026

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JDaniel

Lake Worth, US

★★★★★ 5

Ready, Set, Smile

So far I’m impressed! I’m anxious to see the results after more time. It’s easy to use and it seems much more professional than others I’ve tried.

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Reviewed in the United States on May 15, 2026

David J

Grantham, US

★★★★★ 3

Haven't seen an extreme difference

This looks to work about as good as any other teeth whitening product out there. It has the whole mouth piece with the light, i can't say is actually doing anything special. The real magic seems to be whatever is in the tubes, but the stuff only works about as well as any other whitening strip i've ever used. You'll get a few shades whiter, but nothing absolutely crazy. I think for the trouble of applying and then wearing the mouth piece to throw the light on to get the whole thing going, i'd rather just use burst white strips or something similar.

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Reviewed in the United States on March 27, 2025

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Massapequa, US

★★★★★ 5

I loved

I saw an incredible difference right from the very first use. I recommend this product—go ahead and buy it; you're going to love it.

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Reviewed in the United States on April 3, 2026

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Barbara