Yu Youzhen, a Chinese millionaire, works as a street sweeper for the sanitation department to set an example for her children.
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Scientists in Germany have developed a candy that doesn't cause cavities.
11
MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
18
There is a fake village with fake shops and restaurants that is actually a care home for elderly dementia sufferers in the Netherlands.
7