This suggested that the so-called "isospin symmetry" between up and down quarks might be broken by more than expected due to the differences in their electric charges and masses—a discrepancy ...

In particular, he developed algebraic tools to solve tough problems such as differential equations, and he greatly extended the scope of the mathematical theory of symmetry known as representation ...

The Trump administration will not defy a judge's order blocking the use of war powers to deport alleged Venezuelan gang members, the border czar Tom Homan said on Sunday. Homan told ABC News ...