This optical supercell traps sunlight, then amplifies its intensity up to 6,000×, creating a light surge scientists compare to thousands of panels ...
Plus: Iran refuses to end nuclear enrichment as US talks progress; Trump posts, then deletes racist clip of Obamas; Suicide bomber kills 31 in Islamabad Shiite mosque.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results