It couldn't just be boiled and eaten straight away as it is today. Nine thousand years ago, the maize cob was very hard, and eating it raw would have made you very ill.

不像今天的玉米，可以直接煮来吃。九千年前，玉米芯是很硬很硬的，啃不下嘴；生吃的话你又会病得很惨。