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And starting Monday, a security force of 700,000 people, who are mainly capital volunteers, went on patrol during daytime hours. Their focus is not only subways and bus stations, but also shopping malls and markets where crowds gather.

And I wish everyone a happy, healthy and prosperous Year of the Dog.

Andrew Marble

Analysis of the data suggests that a blue whale's heart is working at its limit, which may explain why blue whales have never evolved to be bigger, according to the study.

And it comes at no better time as US President Donald Trump will start his first state visit to China in a few days and misperceptions about China are somewhat rife at the White House as well as in average American households.