My grandfather survived because even America’s enemies in 1944 understood that basic rule of humanity. If Donald Trump’s administration had been in charge that day, I’m not sure my family would exist.

AdS/CFT suggests that our three-dimensional universe can be modeled by a two-dimensional surface. AdS (Anti-de Sitter space) ...

For more than a century, physicists have suspected that the familiar three dimensions of space and one of time might be only ...