(BBC News) Researchers in England and Kenya have found that older elephants help a herd to survive.
The older elephant’s memories were found to help its herd survive.
Older elephants can distinguish normal sounds from dangerous sounds. This could keep the herd out of danger.
老象是象群生存的关键
【英国国家广播公司报导】英国与肯亚的研究人员发现，老象对象群的生存有帮助。
根据发现，老象的记忆对其象群的生存有帮助。
老象可以分辨出正常的声音与危险的声音。这可以让象群避开危险。
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