Biological signs can show up 15 to 20 years before other signs do.
It is impossible for farmers to keep up with the activities of each cow individually.
Foreign travelers could also help China politically.
A new report on the performance of American students found little or no improvement over the past year in mathematics and reading skills.
An American pilot who made an emergency landing Tuesday after the plane lost an engine is being praised for her “nerves of steel.”
Two black men arrested in an American Starbucks store say they are working with the company to bring about meaningful changes.
Barbara Bush died Tuesday at her home in Texas.
The Pulitzer Prize is one of the top awards for reporting and the arts in the United States.
The recent United States missile strikes against Syria could increase pressure on North Korea to give up its nuclear weapons.
An American clergyman jailed in Turkey since December 2016 went on trial Monday.