What does he mean by “as many degrees as a thermometer”

It's basically simile. It also depends on which degree it is on the thermometer. If it's referring to the maximum temperature of the thermometer, then that means it's too hot to touch. Hope this helps, bruh!

- "the most famous structure by far at saqqara is djoser's step pyramid. dating from the 3rd dynasty (2667—2448 bc), it was the first all-stone complex ever built on earth."

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