...quantum Mechanics—the Physics Of Our World—requires That

There's A Picture Of My Dorm Room In The College Yearbook As The Most Messy, Most Disgusting Room On The Harvard Campus, Where I Was An Undergraduate.

...things Are The Way They Are In Our Universe Because If They Weren't, We Wouldn't Be Here To Notice.

I've Seen Children's Eyes Light Up When I Tell Them About Black Holes And The Big Bang.

String Theory Envisions A Multiverse In Which Our Universe Is One Slice Of Bread In A Big Cosmic Loaf. The Other Slices Would Be Displaced From Ours In Some Extra Dimension Of Space.

Our Eyes Only See The Big Dimensions, But Beyond Those There Are Others That Escape Detection Because They Are So Small.