This is Scientific American's 60-second Science, I'm Christopher Intagliata.
If you find yourself at a cookout this 4th of July, gazing at the hot dogs, wondering ... what exactly are they? Here's your answer:
"They're just tubes of fat." Tyler Rouse, a pathologist at the Stratford General Hospital in Ontario, Canada. And I may as well give a spoiler alert before continuing this story, because "I've ruined hot dogs for many people."
A couple years back, Rouse, too, was wondering about the composition of franks. Given his day job, "I said, that's an easy answer to find out. We work in a lab, we make slides all day. Hot dogs are kind of the perfect shape to make into a slide. We can actually answer this question."
So he and his colleague Jordan Radigan got their hands on three types of dogs: a no-name brand from the supermarket, another all-beef dog and a third from a ballpark vendor. They then took cross sections for slides and used stains to identify different types of tissue. And found, to their surprise, that most slices consisted primarily of fat globules, with very little skeletal muscle—the stuff we tend to think of as "meat." In fact, the no-name brand actually had more skeletal muscle than the all-beef brand. The researchers also found bits of bone and blood vessels and cartilage—even plant material. How did vegetable matter get in there?
"Let me put it this way. Sometimes I get biopsies from human colons and I find vegetable matter. I'll just leave it at that." 看到这你有什么想法？是不是有点恶心，哎，不说了，今天的晚饭不吃了，我想静静。
The results were published in the Medical Journal of Australia.
But there's one thing they didn't find: tissue from the lips or anuses of animals—putting to rest that urban legend, at least for this study sample.
Nevertheless, "I will admit that my hot dog consumption dropped to nearly zero."
Thanks for listening for Scientific American — 60-Second Science. I'm Christopher Intagliata.
---from Scientific American
spoil vt. 溺爱；糟蹋；破坏
composition n. 作文，作曲，作品；[材] 构成；合成物；成分
all-beef dog 全牛肉热狗（火腿肠）
ballpark vendor 棒球场的小贩
vendor n. 卖主；小贩；供应商；自动售货机
stains n. 污点（stain的复数）；[试剂][生物] 染色剂v. 着色
fat globules 脂肪球
globule /ˈɡlɑːbjuːl/n. 小滴，液滴；小球体
skeletal muscle 骨骼肌
cartilage /ˈkɑːrtɪlɪdʒ/n. 软骨
plant material 种植物料；植物体
putting to rest that urban legend 结束了那个都市传奇（对那个谣言进行了辟谣）