21 MAR 2015 by ideonexus

## Running In Elderly Promotes Walking-Economy of Youth

Older runners had a 7–10% better walking economy than older walkers over the range of speeds tested (p = .016) and had walking economy similar to young sedentary adults over a similar range of speeds (p = .237). We found no substantial biomechanical differences between older walkers and runners. In contrast to older runners, older walkers had similar walking economy as older sedentary adults (p = .461) and ~26% worse walking economy than young adults (p<.0001).
Folksonomies: longevity
Folksonomies: longevity
1  notes

05 OCT 2014 by ideonexus

## Relativity in Space Warfare

"Most of you are too young to remember the term future shock. Back in the seventies, some people felt that technological progress was so rapid that people, normal people, couldn't cope with it; that they wouldn't have time to get used to the present before the future was upon them. A man named Toffler coined the term future shock to describe this situation." The commodore could get pretty academic. "We're caught up in a physical situation that resembles this scholarly concept. The result has...

Having to travel at speeds of light means facing a future version of the enemy and that you are attacking them from the past.

31 JUL 2013 by ideonexus

## Science Manipulates Language to Make it More Precise

Let us consider two spheres moving in different di- rections on a smooth table. So as to have a definite picture, we may assume the two directions perpendicu- lar to each other. Since there are no external forces acting, the motions are perfectly uniform. Suppose, further, that the speeds are equal, that is, both cover the same distance in the same interval of time. But is it correct to say that the two spheres have the same velocity? The answer can be yes or no ! If the speedo- mete...
1  1  notes

The example is "velocity" which in common parlance is the same as "speed," but in science it means "speed and direction."

01 JAN 2012 by ideonexus

## Space Exploration Costs the Same as Exploring the World

The Solar System is much vaster than the Earth, but the speeds of our spacecraft are, of course, much greater than the speeds of the sailing ships of the fifteenth and sixteenth centuries. The spacecraft trip from the Earth to the Moon is faster than was the galleon trip from Spain to the Canary Islands. The voyage from Earth to Mars will take as long as did the sailing time from England to North America; the journey from Earth to the moons of Jupiter will require about the same time as did t...
1  1  notes

Europe spent as much money proportionally to discover America as it would cost us to venture to Mars.

01 JUL 2011 by ideonexus

## Two Examples of Leaping to Conclusions without the Facts

Let me give you two examples of leaping to conclusions without the full facts. Back in the 1890’s, a certain California newspaper was apprehensive about the harmful effects the railroads would have on the environment. If the trains crossed the Mojave to get to the Pacific, this newspaper editorialized, “the huge iron rails will reverse the Earth’s magnetic field with catastrophic effects.” Now that’s real science! One hundred forty years ago, the Royal Society in England warned agai...
Folksonomies: facts prescience error
Folksonomies: facts prescience error

People, even scientists, thought the train would come apart and asphyxiate its passengers at speeds of 35 MPH, and the rocket was disregarded by the military until the Germans adopted it.