If you've ever gotten a hot shock from someone flushing a toilet while you were taking a shower, there's an easy fix for that. Learn why it happens and how to fix it in this classic episode of BrainStuff.

Depending on the camera settings and recording technology used to film helicopters, the blades can appear to bend, fragment, stand still, or move backwards. Learn why in this classic episode of BrainStuff.

Karl Marx was one of the most influential (and, ultimately, destructive) thinkers in history. Learn about his life, what he wrote, and why his ideas are still worthwhile in this episode of BrainStuff.

The eighth planet in our solar system is fairly mysterious: Why is it tilted on its side? Why is it so much colder than similar planet? Learn what we know -- and what we don't know -- about Uranus in this episode of BrainStuff.

Cuttlefish are clever cephalopods that communicate with color. Learn the basics about cuttlefish in this episode of BrainStuff.

Together, Mitsuye Endo and James C. Purcell -- a Japanese-American woman and her lawyer -- brought down Executive Order 9066, which interred Japanese Americans during WWII. Learn about the order and its demise in this episode of BrainStuff.

From an uncertain start to an empire of kitsch, Chia Pets have become an American icon. Learn the history behind the trend in this episode of BrainStuff.

It’s almost impossible to trick your brain in order to tickle yourself. Learn why, and how tickling works to begin with, in this classic episode of BrainStuff.

Anxiety is a normal, healthy response in the human body, but when it interferes with daily life it can become a disorder. Learn about anxiety's symptoms and biochemistry -- and how you treat it -- in this classic episode of BrainStuff..

Antibodies are an important part of our immune system's toolkit in identifying and fighting infections. Learn how they work -- and what antibody tests can tell us -- in this episode of BrainStuff.

Yes, NASA has a beach house, and yes, it's the setting for some fabulous stories. Learn the history of the the Kennedy Space Center Beach House and Conference Center in this episode of BrainStuff.

African American folk spirituals were participatory music meant not just to comfort but to convey messages among enslaved people. Learn how historians think they worked -- and how they influenced modern music -- in this episode of BrainStuff.

If you've ever heard a group of birds cawing their little lungs out for minutes on end, you may have heard a bird mob. Learn how bird mobs work in this episode of BrainStuff.

Tales of honorable samurai and unscrupulous ninja abound, but are these legends based in reality? (Spoiler alert: uh, sorta.) Learn about the real history of samurai and how the stories came about in this episode of BrainStuff.

You may have heard that if you keep your eyes open during a sneeze, they could pop out of their sockets -- but is that true? Learn the science of how your eyes stay in your head -- and why they can pop out -- in this classic episode of BrainStuff.

Sure, night vision looks cool in the movies - but what is it, exactly? Learn how can a scope or a pair of goggles help you see in near-absolute darkness in this classic episode of BrainStuff.

The largest jigsaw puzzles in the world have hundreds of thousands of pieces, but the hardest have less than a dozen. Learn about record-breaking jigsaw puzzles -- including the first one in history -- in this episode of BrainStuff.

Motor vehicles need to be driven to keep them in working order. Learn how just 20 minutes a week can help, plus other tips for maintenance, in this episode of BrainStuff.

NASA has announced the first launch of American astronauts from U.S. soil in almost a decade -- and it will be on a privately developed spacecraft. Learn about the mission and what it could mean in this episode of BrainStuff.