The first of 10,000 troops sent to Mexico's northern border began patrolling on Wednesday. The troops have been sent ...

The first of 10,000 troops sent to Mexico's northern border began patrolling on Wednesday. The troops have been sent following tariff threats by U.S. President Donald Trump. (AP video shot by: ...

Maps created by combining different models of glaciers and ice sheets reveal the way water is flowing deep beneath Antarctica ...