HDG Blog

The Last and First Solar Eclipse

The final total solar eclipse of the second millennium occurred on August 11, 1999. It was visible across much of Romania, who celebrated it with ...

Pop Quiz Hotshot: What Is An Euler Diagram?

So what's an Euler diagram and why is it "an" not "a" and why does it look like a Venn diagram and what the hell's the difference? Today we're goin...

That Time When You Could Buy A Human Being For Two Seashells

While researching our Cowrie Blanket, we learned that Uganda’s pre-colonial currency was the cowrie shell and there was a time when it cost less t...

48 Countries That Beat The U.S. To (Tender) Gender Equality

The U.S. is one of the last developed countries to still not have a woman on its paper money. Kyrgyzstan, a former Soviet Republic, got there deca...

Fart Proudly America! It's What Ben Franklin Would Have Wanted

Benjamin Franklin, esteemed statesman, brilliant inventor...proud farter? Yep, in addition to being "The First American," Franklin also authored A ...

Sorry Blackbeard, The Greatest Pirate That Ever Lived Was A Woman

Forget about that chump Edward Teach, the world's greatest pirate was a 19th-century Cantonese prostitute who commanded over 80,000 men and 1,800...

The Gaucho Diet

As anyone who has been to Argentina will attest, the Argentines freaking love their yerba mate. So it should come as no surprise that they put it ...

The OG Aussie Feminist You Should Know About

Edith Cowan was an OG suffragette, social reformer, and feminist trailblazer we all should know about. Seriously, this woman is a legend. It's why...

13 Things I Learned About This Weird Double Triangle Symbol

Some symbols are so ancient that pretty much every culture on earth has some variant. The hourglass shaped symbol at the bottom of our Unity Blank...