Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.
BEIJING, Jan. 20 (Xinhua) -- A Chinese foreign ministry spokesperson said on Monday that the United States should earnestly listen to the voice of reason and provide an open, fair, just and ...
Pei said that currently, all the requirements of the new regulations are supported by mature ... as the country continued its efforts to improve environmental conditions, according to data the ...