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Why do Bats Transmit so Many Diseases Like Ebola?

If you’ve always wondered why bats keep on transmitting dangerous diseases such as ebola to humans while they keep relatively unharmed by them, be sure to watch this!

The History of Tattoos

If you have a tattoo, you’re part of a rich cultural history that dates back at least 8,000 years. Where did this practice of body modification come from, and how has its function changed over time? Addison Anderson tracks the history of getting inked.

(view full lesson at TED-Ed)

7 Things You (Probably) Didn’t Know About Fight Club

From “Se7en” the “Social Network” David Fincher has been impressing as a director for decades. In advance of the release of “Gone Girl” soon, CineFix looked back at our favorite Fincher Flick: Fight Club.

It’s been a good 15 years since Fight Club hit theaters, but we’re still hearing Tyler Durden’s voice in our minds.

A Good Question: Why Can’t I Put Metal in the Microwave? [SciShow]

We know we’re not supposed to put metal in the microwave, but why? We don’t microwave silverware but what about Hot Pocket wrappers? They have metal on the inside. How does that work?

Let Michael Aranda explain.

(by scishow)

What’s In Your iPhone? - The Chemistry Behind Smartphones [Reactions]

The iPhone 6 is almost here and the preorders are piling up. But what do you really know about the insides of the iPhone 6, or any smartphone for that matter? We’ve found the chemical elements lurking inside a smartphone.

A typical smartphone contains about 300 milligrams of silver and 30 milligrams of gold. Not to mention small amounts of extremely rare elements like praseodymium, gadolinium and terbium. And what’s with this “ion-strengthened glass” that Apple is bragging about? It’s all about the potassium bath your phone takes before it rolls off the assembly line.

Science: Why We Love Repetition in Music

How many times does the chorus repeat in your favorite song? How many times have you listened to that chorus? Repetition in music isn’t just a feature of Western pop songs, either; it’s a global phenomenon. Why?

Elizabeth Hellmuth Margulis walks us through the basic principles of the ‘exposure effect,’ detailing how repetition invites us into music as active participants, rather than passive listeners.

Watch full lesson here.