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THE KNOWLEDGE FEED

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8 Dangerous Items That Used to be Allowed in Kids' Chemistry Kits

Maggie Malach

Way back when, chemistry sets were stocked with poison and blowtorches, all in the name of education.

Edith Wharton's Rattle Might Be the Perfect Gift for Well-Heeled Babies

Kirstin Fawcett

The sterling-silver toy is selling for $16,500.

Arrowhead with Human Blood Likely Used in Mayan Bloodletting Ritual

Andrew LaSane

Researchers believe that blood was spilled to "feed the gods."

Infographic of Facts About the Languages of the Star Wars Films

Alvin Ward

The release of the trailer for 'Star Wars: The Force Awakens' means it's time to start brushing up on your Wookiespeak.

18 Fun Facts About 'Mallrats'

Roger Cormier

Kevin Smith's sophomore feature, which is about to get a sequel, was released in theaters 20 years ago today.

Physicists Find That Animals’ Top Speeds Are Proportional to Body Length

Shaunacy Ferro

A new paper finds that an animal’s top speed is unrelated to the mass of its body. Rather, it’s all about the length.

Giant, Fully-Functioning LEGO Caravan Breaks World Record

Rebecca OConnell

The project took more than 1000 hours over 12 weeks to complete.

This Happiness-Tracking App Will Analyze Your Moods

Anna Green

The app attempts to pinpoint the underlying causes of your happiness.

The Missing Links: Conspiracy at the Denver Airport

Colin Patrick

You Can Bid to Name a New Moth Species on eBay

Kirstin Fawcett

Hurry up, insect lovers—the auction ends Oct. 23.

Lyft is Giving Free DeLorean Rides for 'Back to the Future' Day

Michele Debczak

Roads? Where these DeLoreans are going, they unfortunately do need roads.

9 Rare Pieces of 'Simpsons' Memorabilia From Sotheby’s Sam Simon Auction

Andrew LaSane

From the personal collection of the show's co-creator.

See a List of All the Actors Who Could Have Played Doc Brown

Caitlin Schneider

The list reads like a who's who of beloved '80s actors.

Identify Fossils With This Free App

Anna Green

Now anyone can find and locate ancient fossils.

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