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THE KNOWLEDGE FEED

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World War I Centennial: Turks Retake Adrianople, Bulgaria Asks for Peace

Erik Sass

The First 10 U.S. Patents

Lucas Reilly

Although most of the early "X-Patents" are lost, we have a barebones record of what used to be there, giving us a peek into what America’s earliest inventors were up to.

The Missing Links: Every City Is the Same

Colin Patrick

5 Horrifying Ways Plants Can Fight Back

Ben Eisenkop

Some plants have been slowly plotting their revenge.

First Trailer for New "Cosmos" Series Arrives

Chris Higgins

These Wetsuits Could Make You Invisible to Sharks

The Week

Surf's up.

25 Legit Words from the Hepcats Jive Talk Dictionary

Meg Boeni

Only a drip wouldn’t be storked for such a swellelegant little guide.

How Do Muslims Fast for Ramadan if There’s No Sunset?

Matt Soniak

4 Historical Royal Birthing Traditions

Linda Rodriguez McRobbie

We can’t tell you happened in Kate Middleton's delivery room. But we can tell you what it was like for other historical royal women.

Harry Houdini's Missing Scrapbook Has Been Found

Erik van Rheenen

After 83 years, the escape artist's collection of clippings about Spiritualism pulled a reappearing trick.

10 Lifehacks from 100 Years Ago

The Week Therese Oneill

From steaming out a splinter to stopping a mad dog, here's how your ancestors handled life's big problems.

A Crudely Drawn Penis Almost Derailed Huckleberry Finn

Matt Soniak

The Adventures of Huckleberry Finn is about as American as it gets. Funny, then, that the book was released in England well before it hit shelves in the U.S.

Last Week's Most Popular Stories (Plus a Request!)

Jason English

In case you weren't obsessively refreshing mentalfloss.com all week, here's what you missed.

Understanding the Placebo Effect

Chris Higgins

Weekend Links: Sea Lions Find Ways to Stay Cool

Roma Panganiban

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