dense

A group of European astronomers provided information that recent supernovae are not as normal as we thought. Instead, the star is said to have exploded and fell into a black hole,

The government in Beijing on January 6 gave in to the country's massive Internet campaign, demanding to change the way air quality is measured in the capital, one of the world's

The dense fogs surrounded China's Beijing capital in the past few days, causing health concerns, leaving hundreds of flights canceled.