Today's Wants Become Tomorrow's Needs

"The pie keeps growing because things that look like wants today are needs tomorrow," argued Marc Andreessen, the Netscape cofounder, who lelped to ignite a whole new industry, e-commerce, that now employs mil)ns of specialists around the wodd, specialists whose jobs weren't even lagined when Bill Clinton became president. I like going to coflfee shops occasionally, but now that Starbucks is here, I need my coffee, and that new need has spawned a whole new industry. I always wanted to be able...

 Science Fiction and Science as a Two-Way Street

Science fiction like Star Trek is not only good fun but it also serves a serious purpose, that of expanding the human imagination. We may not yet be able to boldly go where no man (or woman) has gone before, but at least we can do it in the mind. We can explore how the human spirit might respond to future developments in science and we can speculate on what those developments might be. There is a two-way trade between science fiction and science. Science fiction suggests ideas that scientists...

 Mathematical Proof that an Arm's Length of DNA is in Ever...

We know from X-ray diffraction studies that a strand of DNA is 1.5 nanometers (1.5 x 10 to the -9 meters) in radius. Assume a cylinder 1 meter long (the arm's length) with a radius of 1.5 nanometers and work out the volume (length x pi r-squared). A typical animal cell is about 8 micrometers (8 x 10 to the -6 meters) in radius. Assume a spherical cell and calculate the volume (4/3 pi r-cubed). Do it yourself. You will see that the DNA fits easily inside the cell, with plenty of room for all o...