Payton Manning is coming to Denver

The number 18 is already retired. What original Denver Broncos QB and current octogenarian, for whom the #18 was retired, recently said that he would be fine with Manning using that number anyway?

I Thought It Meant "Where I Went To College"

What does the phrase "alma mater" literally mean?

It's Still the Tallest Tower In The World

What city finished construction on the SECOND tallest structure in the world in February 2010 (just a month after the Burj in Dubai was completed)?

There Can Be Only One

The street names in the board game Monopoly are all based on what U.S. city?

It's High Time You Answered This Question

What do these 7 things have in common?

Kilimanjaro
Vinson Massif
Carstensz Pyramid
Everest
Elbrus
Mount McKinley (aka Denali)
Aconcagua

...and ONLY these 7 things.
(hint: what else are there exactly 7 of?)