ADDIS ABABA, Ethiopia — Ethiopia’s prime minister said Thursday that his country’s controversial power dam on the Nile has ...

Experts say flash-flooding like what happened in Central Texas is unlikely to happen in Columbus, Ga. The city sits on the ...

This article was originally published with the title “The Failure of the Austin Dam” in Scientific American Magazine Vol. 105 No. 16 (October 1911), p. 331 doi:10.1038 ...

Andrew Van Dam writes the Department of Data column each week for The Washington Post. He has covered economics and wrangled data and graphics for The Post and the Wall Street Journal.