What's the Kennection? #213

What smash hit Mumford & Sons album of 2012 was inspired by a mythical Mesopotamian tower?

What ancient city shares its name with a system of weights which is, unlike avoirdupois units, commonly used for gold and gemstones?

What three words did the Massachusetts town of Manchester add to its name in 1989, to prevent confusion with the largest city in New Hampshire?

In Genesis 3:24, God places angels with flaming swords in Eden to keep Adam and Eve away from what symbol of immortality?

How many bones are there in the neck of a giraffe, the same number as the human neck has?

What's the "Kennection"?