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January 26 th marks the passing of Edward Jenner. Jenner was the English physician who noticed milk maids who had been infected with cowpox seemed to never contract the more serious disease, smallpox. Smallpox kills a third of the people who contract the disease, but if a person survives smallpox, they never catch it again. Variolation was the predominant smallpox treatment of the time. Variolation is when healthy people are exposed to a disease in hopes of giving them a milder (survivable) case of the disease. Between 2 and 3% of people exposed to variolation died. Dr. Jenner tried a different route. He collected the pus from a cowpox sore on a milk maid and injected it into a young boy. He developed cowpox but quickly got over it. A couple weeks later Jenner exposed the boy to smallpox. He did not develop the disease. Jenner called his treatment a vaccine, from the Latin 'vaca', which means 'cow'. This treatment quickly became a standard treatment and...

Cut flowers are beautiful and they still smell lovely when you turn out the lights, but don't you wish the flowers would stay beautiful in the dark? Well, they can! There is more than one way to make a glowing flower. Also, there are some hoaxes out there on the internet about how to make flowers glow, so I'll steer you clear of those.   Glowing Flower - Method #1 Test a highlighter pen to make sure it glows under black (fluorescent) light. Yellow is reliable, but some other colors glow brightly, too. Use a knife or saw to cut open the pen and expose the fibers which contain the ink. Remove the ink strip. Squeeze dye from the ink pad into a small amount of water. Trim the end of a flower so that it will be able to take up water. Place the flower in the water with the ink. Allow several hours for the flower to absorb the fluorescent ink. When the flower has taken in the ink its petals will glow under black light.

Do you have trouble remembering which variable goes on the x-axis and which goes on the y-axis when you plot your experimental data? There's a handy acronym called DRY MIX that can help you keep it straight. You control and measure variables in an experiment and then record and analyze the data. There is a standard way to graph the data, with the independent variable on the x-axis and the dependent variable on the y-axis. How do you remember what independent and dependent variables are and where to put them on the graph? There is a handy acronym: DRY MIX D = dependent variable R = responding variable Y = graph information on the vertical or y-axis M = manipulated variable I = independent variable X = graph information on the horizontal or x-axis The dependent variable is the one being tested. It is called dependent because it depends on the independent variable. Sometimes it is called the responding variable. The independent variable is the one...

Hydrogen is one of the easiest gases to prepare. You can do it at home, using water! The easiest method uses electricity from a battery to split water, H 2 O, to release hydrogen gas, H 2 . This electrolysis method can be improved several ways, plus there are several other reactions that produce hydrogen... Learn how

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