Kevin Sites in the Hot Zone - Chapter 15: Coming HomeIn this final chapter of "A World of Conflict," Kevin Sites returns home to the U.S., only to confirm what he suspected -- that in the year that he was gone little had changed.

Kevin Sites in the Hot Zone - Chapter 14: Israel-Hezbollah WarThe war between Israel and Hezbollah shook the landscape in the Middle East.

Kevin Sites in the Hot Zone - Chapter 13: Sri LankaKevin Sites covered Sri Lanka as violence erupted between the government and Tamil Tiger rebels, pushing a nation with so much to lose back to the brink of all-out war. In rebel-held territory Sites interviewed Tiger fighters about their tactics and reported on the many effects of war still seen in the region.

Kevin Sites in the Hot Zone - Chapter 12: Nepal and KashmirKevin Sites covered Nepal during a time of sweeping political change that followed mass nationwide protests, forcing the autocratic King to cede power.

Kevin Sites in the Hot Zone - Chapter 11: Child BrideIn Afghanistan, Kevin Sites met a 12-year-old girl named Gulsoma, whose incredible story of resilience resonated with millions of people worldwide. She was only six years old when she was sold to a neighbor family in Kandahar as a child bride.

Kevin Sites in the Hot Zone - Chapter 10: AfghanistanReporting from Afghanistan in spring 2006, more than four years after the U.S.-led coalition ousted the Taliban, Kevin Sites found that war is not over in the country.

Kevin Sites in the Hot Zone - Chapter Nine: ChechnyaIn Chechnya during the winter of 2005-2006, Kevin Sites reported on a region still reeling from lingering conflict between Russia and Islamic separatists. The conflict engulfed Chechnya in the 1990s, and even now, half of the population is yet to return. Those that have eke out a living amid the rubble.

Kevin Sites in the Hot Zone - Chapter Eight: Iran

Kevin Sites in the Hot Zone - Chapter Seven: IsraelIn Israel, Kevin Sites interviewed Kinneret Boosany, a victim of a suicide bombing at a Tel Aviv cafe in 2002.

1885: Sylvanus F. Bowser delivers the first gasoline pump. It improves safety, but can't guarantee low prices.

The automobile was yet to be invented, and gasoline was a byproduct of refining kerosene for stoves and lamps. Some of that equipment could use gasoline, but it wasn't much in demand.

You bought fuel in a general, hardware or grocery store. You had to bring your own gallon (or whatever) can, and the storekeeper would ladle the flammable fluid from a barrel. Wasteful. Messy. Dangerous.

To reduce spillage, Bowser built a pump in his Fort Wayne, Indiana, barn. He sold and delivered the first one to Fort Wayne merchant Jake Gumper 123 years ago today.

The self-contained unit included a wooden storage barrel, marble valves, a wooden plunger, a hand lever and an upright faucet lever. It was a success. Bowser formed the S.F. Bowser Company and patented his pump in 1887.

The Bowser pump soon became known as a "filling station," and Bowser started selling an improved model to the first automobile-repair garages in 1893.

Most places that sold fuel to motorists used the "drum and measure" method. Gasoline was gravity-fed from a large steel drum into a five-gallon measuring can. The motorist then carried the can over to his automobile and poured the fuel into the car's tank through a funnel that was lined with a chamois filter to remove grit and impurities. A big bother all around, and not awfully safe, either.

Bowser came up with a big improvement in 1905: He enclosed a square, metal tank in a wooden cabinet equipped with a forced-suction pump. A hand-stroke lever pumped the gas. This pump featured air vents for safety, stops that you could set to deliver a predetermined quantity and -- wonder of wonders -- a hose to dispense the gasoline directly into the vehicle's fuel tank. He called it the Bowser Self-Measuring Gasoline Storage Pump. (Rival John J. Tokheim of Cedar Rapids, Iowa, had fitted a pump with a direct-delivery hose in 1903.)

The word bowser soon became a generic term for a vertical gasoline pump. That usage has dropped away in the United States, but lingers in Australia, New Zealand and, to a lesser extent, Canada. A bowser is also a tank truck that delivers fuel to airplanes on the tarmac, and in Britain the term applies as well to self-propelled tanks carrying any fluid that is delivered directly to the end user -- for instance, water after a disaster.

Bowser's later career was quirky and litigious. He invented and personally marketed a backscratcher and a sit-down enema. He also sold postcards of himself next to the "Stone of Scone," part of the coronation throne on which British monarchs sit while being crowned in Westminster Abbey.

Source: Petroleum Collectibles Monthly, others

PASADENA, California – For all you moonshine makers who thought your hobby was just a guilty pleasure, a new spin on distilling may actually help save lives. Using ancient technology reduced to a microscopic scale, scientists at Caltech have created new tools to detect disease and purify water using tiny stills.

The creation of the still around A.D. 500 was one of humanity's earliest, and still quite popular, technological advancements. Traditionally, a still boils liquids in order to vaporize and separate them. Now, using nanoparticles and lasers, liquids no longer need to be boiled to be separated.

Removing the heat requirement from distillation means the process could be used to separate living cells without killing them, which could lead to advanced disease detection. Other applications include extracting water cheaply and efficiently from sea water in low-energy saltwater distillation plants.

How do they do it? Take a tour through professor David Boyd's lab and go behind the scenes of this revolutionary process.

Left: A green laser evaporates the water from a liquid. This is the final stage of nano distillation.

Here is a diagram of the basic nano still technique. At top is the initial setup with gold nanoparticles sitting on top of a glass slide. The fluid waiting to be distilled is enclosed from above by a silicone rubber chip.

In the bottom diagram, a green laser operating near the resonant frequency of the gold particles is applied. The laser heats the gold nanoparticles, which then transfer the heat to the surrounding fluid. This small amount of heat is just enough to cause controlled evaporation over the gas bubble barrier, leaving pure water on the right-hand side of the diagram.

Click through to the next photo to take a closer look at each of these steps.

Illustration: Chemical Separations by Bubble Assisted Interphase Mass-Transfer, David A. Boyd, James Adelman, David Goodwin, and Demetri Psaltis

This spin coater is used to spread out the thin layer of gold nanoparticles on the glass slide. A drop of the gold solution is placed on the slide and the coater spins extremely fast. This spinning spreads the solution evenly and coats the slide with a nearly uniform 15-nanometer layer of gold.

To get a controlled spacing of particles there needs to be a structure in place to hold them. To achieve this, scientists add a polymer to the gold solution. This polymer forms a uniform lattice to structure all the gold. But observant readers will notice there was no polymer in the previous diagram. Where does it go? Click to the next photo to find out.

This is an oxygen etcher. Once the glass slide is covered with the polymer-and-gold solution, this etcher burns off the polymer, leaving just the gold behind.

This is a sample slide covered with a matrix of gold nanoparticles. The purple streaks on the slide are the nanoparticles, visibly spreading out from the initial drop applied to the slide during the spin coating. For those readers expecting the entire slide to be purple, scientists actually need only a small portion of the slide to be covered uniformly by the gold, so these streaks will suffice.

The particles have a unique property of rapidly dissipating heat, which is a key factor in how the still works.

In another part of the lab, the piece of silicone rubber is made. If you think back to the second image in this gallery, you'll recall that the silicone rubber encloses the fluid between itself and the glass slide. This piece of silicone is called the microfluidic chip because of the fluid channels carved into it.

The machine pictured at left is called a mask aligner. It creates a mold for the microfluidic chip. It does this by exposing an image (in this case, the shape and design of the chip) to a photosensitive material. The unexposed portion of the material is discarded, and the shape of the mold is all that's left. It's similar to a photo enlarger, but instead of a two-dimensional image, a fully formed nano structure is made. The final mold is then used to create fluid channels in a piece of silicone rubber. This silicone rubber ends up being the microfluidic chip.

Here, the silicone rubber chip is drilled to create ports for the nano still. These ports will be used to inject solutions for distillation and to extract the distilled liquid.

Tiny plugs of silicone are the doughnut holes of the micro-fabrication world. Sadly, these plugs will remain uneaten.

After fabrication of the microfluidic chip, we're ready to put it all together. The chip is glued to the gold-coated slide that we made earlier (pictured at center-left inside petri dish). Now we have a nano still, which has an electronic sensor attached for measuring the conductivity of the fluid.

Sometimes science is messy. This workbench is covered with a collection of syringes and gold nanoparticle-coated glass slides. The syringes are used to inject fluids through the ports into the channels in the still, which we'll see in the next photo.

In this photo, blue "Smurf blood" food-grade dye is injected into the nano still through a syringe. The dye makes it easy to see when the liquid has been distilled. The distilled water will be clear and the remaining water will become darker due to the higher concentration of dye.

A low-powered green diode laser shines down into the still. The laser is roughly the same strength as an off-the-shelf laser pointer. Very little energy is needed in the microdistilling process thanks to the heat-dissipating properties of the gold nanoparticles.

Professor Boyd, the lead researcher on the project, reveals that this process was largely discovered by accident. "We had this problem with [an] air bubble, so we started hitting it with a laser. Instead of getting rid of it, we saw that we were actually causing the distillation process to occur, which was completely unexpected," Boyd explains.

You know it's hard up here for a blimp. Or so says Stephane Rousson, a 39-year-old Frenchman who's hoping to cross the English Channel in a homemade, pedal-powered airship. As a child, he was captivated by the Gossamer Albatross, the first entirely human-powered craft to fly the turbulent stretch from England to France. Hoping to repeat that 1979 feat, Rousson acquired Zeppy, a crank-driven zeppelin. Built originally by Jean Marc Geiser and his son Luc back in 1984, the craft's forward momentum and steering come from a pair of 10-foot movable propellers, churned by a recumbent bike hanging from the ship's belly; Rousson modified the chassis to improve its stability and power. He has logged more than 30 hours of flight time, including a four-hour hop around the coastal town of Toulon. But so far, no English Channel. The problem: Breezes over 5 mph bat the blimp around like a cat playing with a moth. Also, the heat of the sun raises the temperature of the helium in the Zeppy, which could cause it to explode. With the channel typically experiencing only three windless days a year, Rousson will have to time his five-hour, 34-mile flight perfectly. He plans to try again in September. Here's hoping the attempt doesn't go down like a lead balloon.

*Rejected headlines: Big Blimpin', Keep Your Blimp Legs Strong, Blimp's My Ride