The microwave oven is a very useful tool in the kitchen. They are not only used to reheat lunch, dinner or hot pockets. In its "Reader Response" series, readers of The Guardian recently solved a question I never really considered: Can you reverse microwave food? For example, create a device to quickly cool it instead of heating it? Readers sent a variety of responses, each of which was very insightful.

In some well-equipped restaurant kitchens, there is a device called a blast cooler, which is a bit like a reverse convection oven. It uses cold air to cool food quickly, much faster than placing trays in the refrigerator. Valeria Andreoli, a reader of the Guardian, recommended this device. But this is not fun. I want a sci-fi machine, a machine that can also be used for evil purposes.

Another reader, David Sogan, expressed frustration at not being able to answer this very important question. "For many years, I have been trying to solve this idea," he wrote. "Fitting in the garden shed has not yielded any results. Once you solve this problem, maybe you can help me complete another project of mine, a dark flashlight, which projects a'no light' field." I I totally want this dark flashlight. I guess a miniature black hole generator can solve this problem, and may cause the side effect of destroying its users.

Of course, real scientists are also involved. Reader Rose Brown said that she is a nuclear scientist with a PhD in physics, and she replied that she has been thinking about this issue. She explained that there are many ways to extract heat from food, because heat is a by-product of many processes that may cool food, a fact that complicates the situation. Brown said that the laser has been shown to produce negative temperatures in the laboratory, but it does not cause objects to become cold.

Instead, Brown proposed a device similar to a blower cooler that uses cold liquid to extract heat from food. Or it could be a nitrogen blaster, which uses extremely cold temperatures to make your food rock solid.

Adjust your delivery date, exchange coffee roasted to order, and deliver it in the freshest condition according to your schedule.

However, I think we should adopt the answer from Guardian reader Thereisno Owl:

I think the answer here is counterintuitive. Instead of recruiting the best and most dedicated talents in academia and industry to study solutions to this problem, you also need to gather a group of incompetent former science students who have been expelled from the university. In this way, the team will definitely reach zero, so it will be absolutely successful.

I don't think I can provide a better answer than this. Zero degrees. Ha ha. This is good. Don't come to my job, buddy, because those wits are some serious competition.

If you have a few minutes, the reactions of Guardian readers are totally worth reading, so treat this as a distraction during your day.

I think the true reversal will be quite difficult, because the high temperature will cause some changes in the object that will not be reversed when cooling, but it is certain that rapid cooling may occur.

In addition, Mr. Li, it seems that there are some consistent and constructive participants in your takeaway article thread. Can we let some takeaway writers follow them and get them out of the gray area? We will make the takeaway party bigger!