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老爸心软，他不仅不愿意用这种残忍的方式，还希望牛群能经常晒晒太阳，为此还专门拓展出个牛棚的外院，搭出一方露天的铁护栏。只是那铁护栏，隔个十天半个月的就被牛撞破了，于是，老爸也隔个十天半个月，就在田间地畔追着牛跑。
。51吃瓜对此有专业解读
Perhaps it’s the biggest question science has left to answer, how did life begin? Now, molecular biologists in Cambridge university have discovered tiny molecules of RNA which they say might provide some clues. Science journalist and author Philip Ball explains what we know and whether we’ll ever find the origins of life on earth.
It was not immediately clear what caused the crash, but some witnesses said the weather at the time was treacherous.