Tag Archives: space

SR #6: More Diagrams

Me Want!

3D holograms! Me want!!

Last time I introduced you to the idea of a time-space diagram, which is a kind of map used to describe motion. As with many maps and diagrams, we choose to use a flat, two-dimensional representation. Someday hologram technology may advance to casual use of three-dimensional images, but so long as we use paper and display screens, we’re stuck with two.

Motion is movement in both space and time, so we want to use one of our two dimensions to represent time. That leaves us with only one remaining dimension for space, so our diagrams exist in a reduced one-dimensional world.

Today I’ll explore that world in more detail.

Continue reading


Carl Sagan

Carl Sagan 1“We’ve arranged a global civilization in which the most crucial elements — transportation, communications, and all other industries; agriculture, medicine, education, entertainment, protecting the environment; and even the key democratic institution of voting, profoundly depend on science and technology. We have also arranged things so that almost no one understands science and technology. This is a prescription for disaster. We might get away with it for a while, but sooner or later this combustible mixture of ignorance and power is going to blow up in our faces.”

Carl Sagan, The Demon-Haunted World: Science as a Candle in the Dark, 1995

I ran across the above quote on a blog, and it really hit home on a point I’ve been pondering and struggling with recently. It has to do with that line about how “almost no one understands science and technology.” It has to do with how weary I am of living in that world.

But rather than rant about it, here are some other quotes I like from a truly great man and wonderful scientist.

Continue reading