
The infamous Black Death — a pandemic that killed as many as one third to one half of Europeans within just a few years — may have been aided in its devastation by an unknown volcanic eruption. That’s the hypothesis presented in research published December 4 in Communications Earth & Environment, which argues that the eruption triggered several seasons of climate instability and crop failures. That instability, in turn, forced several Italian states to import grain stores from new sources—specifically, from regions surrounding the Black Sea. Riding along on those grain stores, the researchers posit, were fleas infected with Yersinia pestis, the bacterium that causes the plague. (via Scientific American)
Research shows cold pizza might be better for you than hot pizza

Your first thought on hearing this is probably “Why? Why is leftover pizza healthier for me?” And the answer has to do with what happens when you cool the delicious crust. When you cool a pizza to below 40 degrees Fahrenheit, some of the starches in the dough will start to mingle together to form these long chains called resistant starches. They resist digestion, and another word for a carbohydrate that resists digestion is fiber! And even if you reheat the pizza, the chains stay intact, so your body doesn’t break them down to sugar. They mostly pass through. This could help reduce blood sugar spikes for people with diabetes or people who just need more fiber for a healthier gut. And this seems to work for a lot of starches, like rice, pasta, potatoes—even beans and lentils. Heating then cooling the starch changes its properties. It’s like tempering chocolate or forging a stronger steel. (via Scientific American)
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