Most of the 'secrets' up to this point are probably known to a fair amount of people.  The final three are probably unique in all the world.  To separate the two sections, I thought I'd link to a few short articles I've written on various mysteries and myths.
   

In Defense of San Francisco — This is a nice bookend for the hippies article

On Price-Gouging Laws — They sure sound good, don't they?

Who Killed JFK, Jr.? — The most likely answer

"Do These Genes Make Me Look Fat?" — Again, the media is full of nothing but hype

Electrical Usage: A Tragedy of Ignorance — The real skinny on electrical usage

The Beady-Eyed Meat Eaters — Know any vegetarians?

The Bermuda Triangle Explained — Just in case you missed it

Goodbye, Nessie — In case you never heard the real Loch Ness story

The Challenge — Think that dog or cat of yours is pretty smart, don't you?

Computer Facts & Fallacies — Wow, is there a lot of misinformation in this field

History's Mysteries: The Columbus Affair — Columbus wasn't 'first' by a long shot

History's Mysteries: The Magellan Matter — Spain pulls a fast one on everybody

History's Mysteries: The OJ Jury — Like it or not, these guys got it right

Dear Global Warming Denier — Deniers everywhere!