Borders shift, empires collapse, and sometimes entire nations disappear. In this fascinating dive into world history, we ...

Sydney Sweeney is clearing up rumors about her engagement to Jonathan Davino once and for all. When asked by the U.K. newspaper The Sunday Times about their status, Sweeney was honest but withheld ...

Many hydrodynamic variables that influence bubble column performance are: gas holdup distribution, bubble breakup, coalescence and dispersion rate, bubble rise velocity, bubble size distribution, ...