Byzantine hand grenades with Greek fire in the 10th to 12th centuries are on display in the National Museum at Athens. The use of Greek fire, or rather variants thereof, spread to Muslim armies in the Near East, from where it reached China by the 10th century. SciFi short story subject: In the not too distant future our sciences find a way to peer back into time. Soon after we conquer time travel itself. The first traveler was accidentally transported into the ancient past, one Artie Mendez, a well known genius physicist working on the time travel project.
He accidentally transported himself into far past by walking into two convergent monopole beams which had been less than accurately aligned by the ultra high frequency radio energy that was supposed to hold them in place. Several days later he gets spotted by a passing caravan and kidnapped for ransom… His captors can not pronounce his name and simply call him Archemedes…. Skip to content. A replica and diagram of one of the ancient electric cells batteries found near Bagdad.
May 11, You're very welcome, sindh! Shiwi Mar 30, Apr 2, We're glad this Wonder was helpful! Thanks for stopping by! These are some amazing facts about Benjamin Franklin. Mar 4, Hi, pratham! We're glad you learned something new! Mar 2, Feb 24, Electricity is definitely something to be thankful for! Michael Feb 5, Hating electricity means hating games and iPhone. Jul 31, Benjamin franklin did not discover electricity he was proving a point that lightning was a form of electricity.
Wonderopolis Apr 17, Chakravarthy Dec 11, Dec 18, Wonderopolis Mar 30, Stefan Jun 3, They should have mentioned that Nikola Tesla discovered the electricity we use today. Wonderopolis Jun 3, Natalie Apr 21, Apr 22, Hi, jeff! Thanks for stopping by Wonderopolis!
Wonderopolis Sep 20, HaiShy Jan 11, Wonderopolis Jan 11, Marina Freeman Jun 6, Jan 7, Wonderopolis Jun 6, I thought this was really cool. I showed my family and they thought it was cool too!!!! Wonderopolis May 28, May 16, Who discovered electricity is the question, now need answers. Wonderopolis May 16, Ben May 16, AudreyG and Molly from mrs Phi May 15, Hello wonderopolis friends! I loved the wonder today! I like how you wonder friends explain the wonder of the day.
I wonder how you come up with all those ideas? I wonder what the 10th wonder is? Where did they find electricity? I wonder what electricity is made of? How long has electricity been around? Happy wondering day wonderopolis! Wonderopolis May 15, People from TEP came to my school and told us about electricity.
Wonderopolis May 10, Pandakin May 9, Bradley May 9, I loved today's wonder! I remember clicking on it,"Did people really discover electricity? But to discover means also to understand it! I hope Wonderopolis does a wonder about the theatre, stage, acting, etc.
Hopefully it's tomorrow because of caught in the ACT! Wonderopolis May 9, That video is really cool. I wold love to do that! I wonder if he got shocked? He wore gloves so he would not get shocked, I guess. So he probably did not get shocked. I learned a few new things from the words. I wonder if you could somehow make electricity from just air? That I know would be pretty cool, don't you think!? Will from Mrs. Barboza's Class May 9, Dear Wonderopolis, I wonder what produces the static electricity from balloons?
Is it the helium or the rubber? Kolbus at Green Timbers May 9, This is my first visit to Wonderopolis. I am here with 3 very curious students from Ms. Thiessen's class. We are wondering about the video. We all wonder what was that machine that made the electricity? Keerit is wondering how did the man in the video survive?
And also - why did the electricity in the video change color? Jackson wants to know how the man is still alive. Maven is wondering what is the man in the video holding in his hand? We all thought the video was very interesting! Isha May 9, I predict tomorrow's wonder of the day might be who's the first one who said to play tag. DandS May 9, We love electricity.
We are girls. I personally like video games, but my friend likes reading a lot. We love wonderopolis and we hope you guys are here for a long time. Keep wondering D and S. Foster's 2nd Grade May 9, Was the man conducting the electricity a scientist? What tools was he using? Miss Kirsten's Kindergarten GT We thought the electricity video was awesome! We want to know more about how that works. We think tomorrow's Wonder will be about playing tag or doing a show or baseball I was right!
Today's wonder was about electricity. I have no idea about what tomorrow's wonder is about! KF Dragons May 9, That was really "electric"! Zackary That was so cool because the lighting was coming out. Evan Happy Wednesday, Wonderopolis! MichaelCollins May 9, I could not live without electricity, I would die. Cassidy May 9, I love this wonder.
I really like stuff about people and the world, so this is pretty interesting for me. One time I was watching a T. I don't remember what it is called It was really interesting. It was on Cartoon Network. I think that Thomas Edison was a pretty smart person, too, for inventing the light bulb.
Other people don't think that this wonder of the day is cool, like I do. I don't care what they think. I am just glad that you guys did a wonder like this today. Thank you, wonderopolis! Ally fries May 9, This wonder is really cool. I go to Bailey Elementary and every day in library, we look at Wonderopolis and today I have library!
I am so excited! I have no clue what tomorrow's wonder is going to be. Wonderopolis May 13, In Edison arranged for a convicted New York murderer to be put to death in an AC-powered electric chair—a stunt designed to show how dangerous the Westinghouse standard could be.
But Westinghouse was soon forced by his backers to renegotiate their contract, with Tesla relinquishing his royalty rights. In the s Tesla invented electric oscillators, meters, improved lights and the high-voltage transformer known as the Tesla coil. He also experimented with X-rays, gave short-range demonstrations of radio communication two years before Guglielmo Marconi and piloted a radio-controlled boat around a pool in Madison Square Garden.
Tesla relocated to Colorado Springs for two years, returning to New York in He secured backing from financier J. Morgan and began building a global communications network centered on a giant tower at Wardenclyffe, on Long Island. Tesla lived his last decades in a New York hotel, working on new inventions even as his energy and mental health faded.
His obsession with the number three and fastidious washing were dismissed as the eccentricities of genius. Tesla died in his room on January 7, Later that year the U. The AC system he championed and improved remains the global standard for power transmission. But if you see something that doesn't look right, click here to contact us! In , Tesla found funding for his new Tesla Electric Company, and by the end of the year, he had successfully filed several patents for AC-based inventions.
Tesla's AC system soon caught the attention of American engineer and businessman George Westinghouse, who was seeking a solution to supplying the nation with long-distance power. As interest in an AC system grew, Tesla and Westinghouse were put in direct competition with Thomas Edison, who was intent on selling his direct-current DC system to the nation.
A negative press campaign was soon waged by Edison, in an attempt to undermine interest in AC power. Unfortunately for Edison, the Westinghouse Corporation was chosen to supply the lighting at the World's Columbian Exposition in Chicago, and Tesla conducted demonstrations of his AC system there. In the late 19th century, Tesla patented the Tesla coil, which laid the foundation for wireless technologies and is still used in radio technology today.
The heart of an electrical circuit, the Tesla coil is an inductor used in many early radio transmission antennas. The coil works with a capacitor to resonate current and voltage from a power source across the circuit. Tesla himself used his coil to study fluorescence, x-rays, radio, wireless power and electromagnetism in the earth and its atmosphere. Having become obsessed with the wireless transmission of energy, around Tesla set to work on his boldest project yet: to build a global, wireless communication system — to be transmitted through a large electrical tower — for sharing information and providing free energy throughout the world.
With funding from a group of investors that included financial giant J. Morgan , in Tesla began work on the free energy project in earnest, designing and building a lab with a power plant and a massive transmission tower on a site on Long Island, New York, that became known as Wardenclyffe. However, doubts arose among his investors about the plausibility of Tesla's system. As his rival, Guglielmo Marconi — with the financial support of Andrew Carnegie and Thomas Edison — continued to make great advances with his own radio technologies, Tesla had no choice but to abandon the project.
The Wardenclyffe staff was laid off in , and by the site had fallen into foreclosure. Two years later Tesla declared bankruptcy and the tower was dismantled and sold for scrap to help pay the debts he had accrued. After suffering a nervous breakdown following the closure of his free energy project, Tesla eventually returned to work, primarily as a consultant.
But as time went on, his ideas became progressively more outlandish and impractical.
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