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I recently came upon a post exploring the possibility of Time Travel. In that post the writer, ( my friend &tarunandlaxmi ) pointed out that most conventional scientists of our day think backward time travel, or traveling into the past is an impossibility. However, according to Relativity Theory skipping into the future should be quite possible, given the ability to attain great speeds approaching but not quite reaching the speed of light. We aren't that fast yet, but if we should live long enough, and attain sufficient technological advancement, relativistic speeds are within our grasp. When that day comes, the principles of time dilation will make future time travel very possible. However, by that method, it is a one way trip. There would be no way to come back with that particular technological approach. But we are still left with the question; is it possible to travel back to the past, by some other technological method?

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In part 1 of this series, published here at Bubblews, www.bubblews.com/news/454618-time-travel-some-say-impossible-but-is-it-part-1 we introduced this debate, and discussed how as a consequence of Professor Einstein's Relativity Theory, approaching the speed of light creates the phenomenon of time dilation, which is effectively time travel forward into the future at an accelerated rate. This kind of forward time travel is however theoretically a one way trip, without any opportunity to return from that future to your originating "present time". We also dealt with the first, (weakest), of the major arguments used by time travel detractors to justify their unproven stand that time travel into the past is impossible. Here in part 2 we will move on to talking about another much stronger issue; the so-called paradox problem, often employed by those who declare backward time travel impossible. At first glance, this argument appears quite sound, but to really examine any subject properly one must do more than just glance at it.

Rick Cavallaro and John Borton have built a cart that moves 2.86 times the speed of the wind, moving straight downwind. That may seem impossible, but after a year of tinkering and some financial assistance from Google and Joby Energy, they did it. Don't believe me? Check out the video. Keep a weather eye out for the green flag at 0:35. Notice how it's blowing the exact opposite direction of the orange wind socks on the cart? That's because the cart is going faster than the wind.

The cart is quite aerodynamic, so it makes a crappy sail, but it's still a sail. The wind gives it a push, and the car starts to roll, however slowly. As it moves along the ground, the wheels turn. At 0 kph the cart has an air speed (relative to the 10 kph wind) of -10 kph. As it gets rolling, it will catch up to the wind in velocity: at 5 kph ground speed, it has a -5 kph relative air speed, and at 10 kph ground speed, it has a relative air speed of 0 kph. At 10 kph ground speed, the cart is just like the balloon, and would not beat the balloon in a race. But unlike the balloon, the cart has a 17-foot propeller linked by a complicated drive train to the wheels. And it's the wheels that provide the work to turn the propeller. Remember that: The wheels turn the prop. Not the wind. Not magic pixie dust. The wheels turn the propeller. That's important. At 0 kph air speed, the propeller, sections of which have already been pulling on the car, really begins to bite on the air. It pulls the car forward exactly as a propeller pulls an airplane forward. The ground speed of the car increases, turning the wheels faster, which turn the propeller even faster, adding yet more acceleration. And now the whole project seems ridiculous,because everyone knows a perpetual motion machine is impossible. But the wind never stops adding power to the system. Come back to the difference between the relative air speed and the ground speed. In the example, the cart reaches a ground speed of 10 kph, and relative air speed of 0 kph. The propeller kicks in and the cart accelerates: Ground speed rises to 20 kph, with relative air speed of 10 kph; then 30 kph ground speed with relative air speed of 20 kph, then it finally reaches a top speed of 28.6 kph, with a relative air speed of 18.6 kph (meaning, going 18.6 kph faster than the wind). There's some loss to friction and to the drive train, but generally the wheels are always doing 10 kph-worth more work then the propeller, because the

In an industrial plant, there are many types of small and big tools used for various operations and processes. Without these industrial tools, it is almost impossible to run an industry with its best capacity.

A few years ago I was taking a tour of a dome shaped house, and the architect explained to me that domes are an optical illusion. Whenever someone enters a room, their eyes inadvertently glance up at the corners of the room to give them the contextual dimensions of the space they're in.

Senior Futurist at the DaVinci Institute, and Google's top rated Futurist Speaker. Unlike most speakers, Thomas works closely with his Board of Visionaries to develop original research studies. This enables him to speak on unusual topics and translate trends into unique business opportunities.