How Flavor Has Guided Human History & The Threat of Pseudoscience - SYSK Choice
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Why are there ice crystals on your ice cream?
But there's a problem. You see, your freezer regularly goes through a frost-free cycle, which means the temperature actually warms up in there, as high as 45 degrees. During that time, the frost melts and evaporates, and that prevents the frost and the ice from building up. The problem is that your food starts to melt too, and then it refreezes, and that causes problems. This is a big cause of freezer burn, and it's why you get ice crystals on your ice cream. In fact, one food science professor calls frost-free freezers ice cream destruction machines. What happens is, as the temperature goes up and food starts to thaw, the water from the food escapes into the air. As the temperature drops again, the water wants to re-enter the food, but it can't because the food is still mostly frozen. So the water sits on top of the food and freezes into ice crystals. And this happens over and over and over again and can ruin some of the food in your freezer.
One way to prevent or minimize the damage is to keep as little airspace as possible between the food and the package it's in. This will help prevent the water from escaping out of the food because it will have no place to go. And that is something you should know. One of the things that makes modern humans different from other animals, it seems, is we don't just seek out food to nourish and satisfy us. We seek out really tasty, delicious food to nourish and satisfy us. From the way we prepare food and cook it and spice it, we want food to taste good. And even when it does taste good, we sometimes try to make it taste even better.
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Chapters
6 chapters
1
Why are there ice crystals on your ice cream?
2:47–4:35
2
How has flavor influenced human evolution?
4:35–5:46
3
What makes certain foods universally appealing?
5:46–7:43
4
How do humans learn to enjoy different flavors?
7:43–9:40
5
What role did cooking play in human development?
9:40–13:54
6
What has been the historical diet of humans?
13:54–51:27
Speakers
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