This story came across my Google alerts today from the crack team at ABC News… “Science of Mentos-Diet Coke Explosions Explained.” My fingers couldn’t click on the link fast enough. New research finally explains this amazing phenomenon? Here’s the opening sentence of the story…

The startling reaction between Diet Coke and Mentos sweets, made famous in thousands of YouTube videos, finally has a scientific explanation. A study in the US has identified the prime factors that drive the fizzy plumes from Coke bottles: the roughness of the sweet and how fast it plummets to the bottle’s base.

What… this is the big discovery? The Mentos chewy mints have a rough surface and they’re heavy? Well, they’re absolutely correct and they confirmed the original Mentos Eruption explanation published back in 2005. Tonya Coffey, a physicist at Appalachian State University in Boone, North Carolina said, “This was a good project for my students to study because there was still some mystery to it.” Hats off to Coffey and her students for publishing her findings and bringing peer review to the Mentos Geyser experiment.

However, it was nice to have someone else confirm our findings that either fruit or mint Mentos work equally well. “The results showed that Diet Coke created the most spectacular explosions with either fruit or mint Mentos, the fountains travelling a horizontal distance of up to 7 metres.”

It was probably most fun to read the comments on the ABC News blog. What questions or “mysteries” about the Mentos reaction would you like to ask?

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There are literally thousands of online videos featuring the Mentos Geyser experiment, but this video is worth a few minutes of your time. It’s a first-class video produced by Mr. Delos Santos and his third grade class at Stone Ranch Elementary in San Diego, California.

Mr. Santos says that the project first started out as just a science experiment for the unit on Matter, but quickly grew into a much bigger project. But it’s not just a video, the class created their own “Fizz”ical Science website. “The largest challenge in producing a project like this is being able to engage all students in the digital learning process. Teaching them the proper technique and how to convey their message in a clear and systematic way was another challenging aspect of our project,” according to Mr. Santos.

Here’s the best part… The video has been nominated for an iVIE (Innovative Video in Education) Award! The award ceremony will take place on May 20th, and we’ll keep you posted.

BUT… We held our own screening earlier today and our staff would like to present Mr. Delos Santos’ third grade class with our own video award - a $100 gift certificate from SteveSpanglerScience.com Congratulations to the third graders from Stone Ranch Elementary!

…and nice job Mr. Delos Santos - the gift certificate is on its way.

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Tune into Food Network’s Unwrapped to get a peek inside the Spangler Science labs as Steve shares the science behind the Mentos Geyser all of that exploding soda. Back in December, I mentioned that a crew from Unwrapped on the Food Network wanted to get the real scoop on the popular Mentos and soda reaction. The crew spent an entire day grabbing the reaction from every angle and trying to understand how all of those tiny bubbles produce such a huge fountain of soda. The episode is scheduled to air on September 24, 2007. Consult your local listing for time and channel.

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If you’ve ever enjoyed wearing a bottle of Diet Coke after dropping in a roll of Mentos, you know that the reaction is immediate. I’ve always thought that it would be cool if you could slow everything down and really look at the reaction. I shared the idea with our friends at Mentos and they shot this slow motion video. There are a few frames where you can see the carbon dioxide gas coming out of solution being attracted to the tiny pits (nucleation sites) on the surface of the mint. For the tech-nerds in the audience, a Phantom 9.0 high-speed digital camera from Vision Research (2,000 frames per second) captured the slow-motion footage.

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Thousands of science teachers found their way to St. Louis for the 2007 National Science Teachers Association convention, and we wanted to make sure they had something to take back to their students. So, we loaded our trucks with experiments and products from the website along with 5,000 rolls of MENTOS stuffed into plastic test tubes and headed for the Gateway City. We were fortunate to have 14 teacher ambassadors from the Hands-on Science Institute join us in the booth to each share their favorite science activities. Aside from 500 bottles of Diet Coke and a mountain of MENTOS, all eyes were on the 18 foot tall soda eruption chamber. We were demonstrating the new Geyser Tube by triggering a MENTOS geyser as fast as we could set-up a launch (about every 2-3 minutes for 3 full days). At the end of the convention, the soda was gone, the rolls of MENTOS were in the hands of 5,000 teachers, the truck was cleaned out… and we all had a blast. It’s back to the classroom for the 14 ambassadors to start working on cool stuff for next year’s NSTA in Boston.

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We’re excited about the official launch of our new Spangler Geyser Tube. Think of it as the perfect Mentos loading device to trigger a 30 foot geyser of soda. Just load the Mentos candies into the tube, lock the nozzle in place and pull the pin. Okay, it’s bes

t to pull the pin and then run away. The Mentos drop into the bottle triggering the reaction and the powerful soda geyser comes shooting out the top with enough pressure to reach an incredible height of 30 feet. Onlookers scream, “Do it again!”… and you do.

The Geyser Tube retails for $4.95 and is currently only available at www.SteveSpanglerScience.com However, as a result of our licensing agreement with the maker of Mentos (Perfetti Van Melle), the Spangler Geyser Tube will be released into mass market distribution (all of the major toy stores, print catalogs and online stores) in June 2007.

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I’ve always been a fan of Apple Computers (now Apple Inc.). From my very first Apple IIe to my current MacBook Pro (and about a dozen in between), these computers and products have helped me and our employees to do some very amazing things over the years. That’s why it was an honor to be invited to visit Apple last week and speak with a group of their employees about my experiences running our business on a Mac platform. During my visit, we also taped some online seminars that will be posted on apple.com/business in the near future.

Okay, the secret is out… we’ve been in business for 16 years and never had a PC in the office. Read the rest of this entry »

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I recently received an email from Mimi Sylvia and her grandson Scott. Mimi (she has been called that since her oldest granddaughter tried to say “grandma” and it came out “mimi”) loves to teach science to her 10 grandkids and says she doesn’t plan on growing up herself anytime soon.

Every summer, Mimi Sylvia and her husband travel to Montana to visit their daughter and her family. Mimi Sylvia says they pack their car full of experiments and crafts. She loves to show the kids that science is fun.

Mimi and Scotty tried the Mentos and Diet Coke experiment and WOW did they make a splash. Scotty outdid his two older sisters and brother.

We were so impressed with the photo she sent, that we had to share! Keep aiming high, big guy!

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… or is it an optical illusion? Richard Zare is a world-renowned chemist at Stanford University, and he has a particular fascination with bubbles. He recently showed why the bubbles actually go down the side of the glass when you first pull a pint of Guinness.

This gentleman might have something to say about the Mentos reaction. Hmmm?

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Fritz Grobe and Stephen Voltz, the Eepybird guys who turned the Mentos and Diet Coke experiment into art are jumping from the Internet to the mainstream media.

They appeared on David Letterman last Thursday night and on the “Today Show” Friday morning. They demonstrated their version of the Bellagio Fountains done with Mentos and Diet Coke on both shows.

Their video went viral after they posted a 3-minute video on their website using more than 500 Mentos and more than 100 two-liter plastic bottles of Diet Coke in June.

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