The border wall built during the Trump administration now stands along roughly 190 miles of Arizona's border with Mexico.

Robert Wall is Executive Editor for Defense and Space. Based in London, he directs a team of military and space journalists across the U.S., Europe and Asia-Pacific.

Wall Street shrugs off Trump's fresh trade war rhetoric, investors holding firm So far this week, Trump has sent letters to 20 countries threatening new tariff rates and the U.S. market has ...

Cell wall articles from across Nature Portfolio The plant cell wall is a complex matrix of linked polysaccharides such as cellulose and pectin, forming a thick semi-permeable rigid barrier outside ...

Nvidia remains the dominant AI chipmaker in the market, but where is the stock headed for the rest of this year and into the next?

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