16-06-16 Cats understand the principle of cause and effect as well as some elements of physics. Combining these abilities with their keen sense of hearing, they can predict where possible prey hides. These are the findings of researchers from Kyoto Universit...

13-01-16 The Chinese Exclusion Act , approved in 1882 in Congress and lasted for 60 years, was the first and the only federal law in US history that excluded a single group of people from immigration on no basis other than their race. It explicitly banned Ch...

12-10-30 Smoke-free legislation was associated with substantially fewer hospitalizations and deaths from heart and respiratory（呼吸的） diseases, according to research in the American Heart Association journal Circulation. Researchers reviewed 45 studies co...