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Andrew Cohen in New York, Xinhua and agencies contributed to this story.
And gravity is at the crux. Undergraduate students in the Department of Physics and Astronomy designed and built a sandbox where users can mold their own universe with sand and watch how gravity affects an object - a spacecraft or a comet, for example - as it travels through the imagined environment.
An outbound Chinese tourist pays with Alipay at the checkout of a shopping mall in Sydney. [Photo by Xu Kangping/For China Daily]
Analysts said on Monday that while US President Donald Trump and Japanese Prime Minister Shinzo Abe had pointed to the strength of bilateral ties during Trump's ongoing visit to Japan, the two nations appear to be diverging on key issues.
Analysis by the institute found that poor rural families are usually large, with multiple seniors and children to support.
