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"if you hold a Slinky by one end and drop it, the bottom end doesn't actually move until the top end catches up with it."

"These are two gigantic solid state musical Tesla Coils. A Tesla Coil is a special type of transformer invented by Nikola Tesla that is able to generating extremely large voltages using a phenomenon known as electrical resonance. Each coil in this video is capable of generating a 13 foot spark. This equates to about 500,000 volts of electricity. "

..updated periodically

"spectrometers into people's hands -- lots of them. For as little as $35, you can now get your own kit and start scanning different materials in your backyard, neighborhood, or household. With one of our latest prototypes -- a spectrometer that attaches to your smartphone (see above) -- we hope to make spectrometry available to anyone,"

how insulation works

"Being able to fly off on holiday is something we may take for granted. But how does the big metal tube you're flying in stay up in the air? We'll find out in the latest Naked Science Scrapbook. Plus we'll see that if the plane's engines stop working, you won't just plummet out of the sky"

"Humans have wanted to fly for thousands of years. Modern jet engines allow us to fly more efficiently, at greater speeds than ever before. In this Naked Science Scrapbook, we'll find out how engineers stop the engines from melting at such high temperatures, and why you couldn't run a plane on coal"

"Here is the famous Honda AD"

If you're sensitive to G forces, aka gravity forces, think twice before going up in a glider and asking the pilot if he knows any tricks. "

"Scientists gear up to take a picture of a black hole - On Wednesday, Jan. 18, astronomers, physicists and scientists from related fields will convene in Tucson, Ariz. from across the world to discuss an endeavor that only a few years ago would have been regarded as nothing less than outrageous."

"The Early Universe Toward the Beginning of Time "

"An electromagnet is a type of magnet in which the magnetic field is produced by the flow of electric current. The magnetic field disappears when the current is turned off. Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment, as well as being employed as industrial lifting electromagnets for picking up and moving heavy iron objects like scrap iron."

Watch the ball toss in the video below. Obviously Agile Justin throws like a robot, kind of sidearm/underhand, not much like a major league pitcher. The coordination between arm, torso, and wheels gives new meaning to the term "pitching mechanics."

"Study of clays suggests watery Mars underground Impact cratering and erosion combine to reveal the composition of the Martian underground by exposing materials from the subsurface. Investigation of exposed clay minerals at thousands of Martian sites by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on NASA's Mars Reconnaissance Orbiter suggests a long period of wet, warm conditions, mostly underground."

"You don't have to be a genius to understand the work of the Nobel Laureates. These games and simulations, based on Nobel Prize-awarded achievements, will teach and inspire you while you're having FUN!"

"Lab Out Loud is a podcast and blog that discusses science news and science education with leading scientists, researchers, science writers and other important figures in the field."

"Visit the IIHS YouTube channel for crash test footage and full-length consumer safety video"

"Learn about two wily pitches that can give pitchers the upper hand in the great American game of baseball."