Versace’s impressive line-up of shirts will be among the 450 original garments, accessories, sketches, interviews and photographs exhibited in the largest retrospective of the designer in the UK. Held ...

The laser beam traveled 3.6 kilometers (over 2 miles) via fiber optic links to NIST, where a frequency comb (acting as a “ruler for light”) allowed the aluminum ion clock’s laser to adopt its superior ...

TOP STORIES -- + Trump gives Russia 50-day ultimatum over Ukraine war + Syria's forces deploy after deadly sectarian clashes + Iran says no nuclear talks if it must end enrichment + US ice cream ...

Policymakers in Washington should adopt the following lines of effort: ...