The conventional history that the " new world " was " discovered " by european explorers will be challenged tomorrow in a public lecture at hku by renowned academics with new evidence that admiral cheng wo may have visited north americas east coast before columbus 传统历史学说认为欧洲人首先发现新大陆，这观点将受到挑战。知名学者将在明天港大举行的公开讲座上提出新证据，揭开郑和早于哥伦布发现北美洲东岸之谜。
