SKU: 24120426127

What If? Serious Scientific Answers to Absurd Hypothetical Questions

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What If? Serious Scientific Answers to Absurd Hypothetical Questionsby Randall Munroe Randall Munroe left NASA in 2005 to start up his hugely popular site XKCD 'a web comic of romance, sarcasm, math and language' which offers a witty take on the world of science and geeks. It now has 600,000 to a million page hits daily. Every now and then, Munroe would get emails asking him to arbitrate a science debate. 'My friend and I were arguing about what would happen if a bullet got struck by lightning, and we agreed that you

by Randall Munroe

Randall Munroe left NASA in 2005 to start up his hugely popular site XKCD 'a web comic of romance, sarcasm, math and language' which offers a witty take on the world of science and geeks. It now has 600,000 to a million page hits daily. Every now and then, Munroe would get emails asking him to arbitrate a science debate. 'My friend and I were arguing about what would happen if a bullet got struck by lightning, and we agreed that you should resolve it . . . ' He liked these questions so much that he started up What If.

If your cells suddenly lost the power to divide, how long would you survive?

How dangerous is it, really, to be in a swimming pool in a thunderstorm?

If we hooked turbines to people exercising in gyms, how much power could we produce?

What if everyone only had one soulmate?

When (if ever) did the sun go down on the British empire?

How fast can you hit a speed bump while driving and live?

What would happen if the moon went away?

In pursuit of answers, Munroe runs computer simulations, pores over stacks of declassified military research memos, solves differential equations, and consults with nuclear reactor operators. His responses are masterpieces of clarity and hilarity, studded with memorable cartoons and infographics. They often predict the complete annihilation of humankind, or at least a really big explosion. Far more than a book for geeks, WHAT IF: Serious Scientific Answers to Absurd Hypothetical Questions explains the laws of science in operation in a way that every intelligent reader will enjoy and feel much the smarter for having read.

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SKU: 24120426127

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Lindsay R.
West Palm Beach, US
★★★★★ 5
A good sun solution for sensitive lips!
Color: White, Size: 0.15 Ounce (Pack of 1)
Having sensitive lips can be super frustrating. They burn SO easily in the sun. But most sunscreen lip balms on the market irritate them. Those that don't irritate aren't moisturizing at all, so my lips become dry and chapped. Which leads to more sensitivity. Ugh. But so far this Sun Bum SPF 30 has worked for me! No sunburnt lips. No irritation. Enough moisture to keep my lips soft and healthy while working or playing outside. Sure, it's s not really pleasant tasting when it gets in your mouth, and like most zinc-based sunscreens, it makes my lips milky white. But it works for my picky lips and it's a good value for the money--it's become my summertime staple.
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Reviewed in the United States on July 20, 2023
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Charlee, The (Mostly) Happy Shopper
Grantham, US
★★★★★ 3
Hydrates, leaves a slight white film, not travel friendly
Color: White, Size: 0.15 Ounce (Pack of 1)
I wear lip balm regularly. As a matter of fact, I always have some with me. Tubes are placed in various areas around my house, I have one in my car, in my backpack and a couple tubes at work. I'm seriously never without it so I kind of consider myself a lip balm expert. The only thing most of the ones I use don't have is SPF. Since I live in an area that is fairly sunny year round, you think I'd be better about that. Well, I'm looking to change that. I saw this Sun Bum SPF 30 Mineral Sunscreen Lip Balm and read some of the reviews. They seemed overwhelmingly positive. I'm familiar with the brand and since it was covered under my HRA, decided to try this one out along with a few others. It glides on easily and moisturizes well, but it left a slight white film on my lips. Not my favorite but it did fade. It's unscented and doesn't have any flavor, which is good. I loathe lip balms with any type of taste to them. Good or bad. It has clean ingredients and offers great sun protection but it doesn't withstand heat itself. If you like to carry one in your pocket, backpack or keep in your car, it will melt. I do like this lip balm but it has some negatives, as stated above. It made my lips feel soft and hydrated but it's not travel friendly. I wouldn't discourage buying it, but if you want a balm to carry around with you, I'd be hesitant to recommend it.
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Reviewed in the United States on February 26, 2024
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Philip K. Stoddard
Boise, US
★★★★★ 5
Really works and it's safe.
Color: White, Size: 0.15 Ounce (Pack of 1)
I am a flats fisherman – this stuff really works, it's smooth, flavorless, reef-safe, and safe to lick. Reapply as often as you remember to.
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Reviewed in the United States on March 22, 2026
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Mimi
Lake Worth, US
★★★★★ 5
Highly recommend. Any graininess and whiteness are minimal and insignificant.
Color: Blanco, Size: 0.15 Ounce (Pack of 2)
This is the best mineral(non-chemical) lip sunscreen I have found. Highly recommend. The first few times I used it, it felt ever so slightly grainy. Maybe the graininess rose to the top. Even if it was grainy all the way through, I would still recommend. There is a slight whitish cast to your lips-not noticeable or significant in my opinion. There is a very minimal flavor and it has a nice feel on your lips.
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Reviewed in the United States on February 7, 2026
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Cameron
New York, US
★★★★★ 5
A must have for your summer bag
I am 100% devoted to Blue Lizard products! I got some extra sun and needed relief, fast. This non-greasy nor slimy cream is exactly what I didn’t know I was looking for. I had applied aloe alone to my skin and received no relief. Within minutes if not seconds of applying this, I had noticed improvement. The consistency is not too thick or too thin, it absorbs into the skin nicely and can be reapplied without getting cakey. It gave my sunburn relief while also moisturizing the skin. I haven’t peeled at ALL. I love that it has clean ingredients and a neutral fragrance. My skin is so sensitive, so having natural ingredients is a plus. Blue Lizard After Sun is now my holy grail and I will recommend it over and over.
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Reviewed in the United States on June 8, 2026

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