Wednesday, January 23, 2008
Bill Nye is back. And this time he is making a science show for teens and adults! Go to the website and click "Menu" and "Episodes" to see clips and more. Each clip has some tabs - the best one, in my opinion, is called "the flip side." Here, he provides links to information about alternate viewpoints on that topic.
The entire 13 episode set can be purchased for $499. Apparently the first shows aired in 2005, but according to the website, if you are in Chicago, WTTW (Channel 11?) is still airing the show! (No shows in San Francisco.) There are also a few examples on YouTube (here's one on Cloning)... at least until Bill Nye pulls them off for copyright infringement.
5. Nuclear Energy
10. Genetically Modified Foods
12. Global Climate Change
13. Evolution of Sex
Random Bill Nye Trivia: He has a degree in Mechanical Engineering from Cornell University. He won a Steve Martin look-alike contest in Seattle. "Bill Nye the Science Guy" was first played on a Seattle comedy show called "Almost Live." He was married for 7 weeks in 2006, before he found out the marriage license was invalid. Which might be a good thing, since he filed a restraining order against the woman a year later. He also loves sundials. (from his website and other sources)
Monday, January 14, 2008
Speedtest.net is a free broadband speed test with servers located all over the world.
All you have to do is click on the "pyramid" nearest you!
Saturday, January 12, 2008
I was surprised to find an article using this term that was posted back in 1994. Reading more about the history of precycling, I found out one of the first communities to focus on precycling was Berkeley, CA all the way back in 1989!
Reduce what you do need
Reuse what you can't reduce
Recycle what you can't reuse
Rebuy (buy recycled) whenever possible.
Here are just some of the many 5R suggestions:
Avoid the paper vs. plastic dilemma.
Buy large single containers.
Pass on styrofoam.
Don't buy plastic razors, throwaway cleansing pads and cigarette lighters, non-refillable pens and foil baking pans. Reduce or eliminate your use of disposable plastic diapers, which make up 2% of the total U.S. landfill volume. Gr-oss!
Compare the size of the package to the size of the product.
Friday, January 4, 2008
Remember that DNA stores the instructions for making you! DNA forms a "double helix" - a kind of twisted ladder in which the "rungs" are made up of nitrogenous bases (A, T, G, or C). A group of 3 of these base pairs is called a codon. Codons tell a cell what amino acid to build. Amino acids are the building blocks of proteins, and proteins are what make the body grow and do a lot of things.
We have a huge amount of DNA in each of our cells. If the DNA from just one of your cells was typed in books, a list of the 3 billion base pairs would fill 200 telephone books. That is from just one cell - and we have trillions of cells in our bodies, and most cells have a complete set of DNA! (kids genetics)(Want to review more about DNA? Check out this really great animation watch this VERY weird DNA music video.)
Anyway, in his presentation, Deamer says, "If melodies are a sequence of notes, and DNA is a sequence of bases, maybe we can turn DNA into music." He went on to compose pieces with the following translation.
- C (cytosine) = C on the musical scale
- A (adenine) = A on the musical scale
- G (guanine) = G on the musical scale
- T (thymine) = E on the musical scale
For example, the insulin gene is coded "TTT GTG AAC CAA..." and so on. The DNA code dictates the notes played, but he does have some freedom with the timing.
You can hear the music if you watch the Wonderfest presentations online. Not surprisingly, it is also posted on YouTube. Fast forward to 16:00 if you would like to hear the part about insulin.
David Deamer also partnered with Susan Alexjander, to create a far-out sounding CD called Sequencia.
In SEQUENCIA, raw data derived from the light absorption spectra of the four bases (adenine, cytosine, thymine, guanine) that make up the DNA molecule is converted into sonic frequencies. These are programmed to a Macintosh computer and sent to a synthesizer, and then arranged into four pitch collections (or four 'scales' based on the individual base molecules). These synthesized notes mixed with vocals, cello, tabla, and violin become the palettes for Alexjander's compositions, which range from somber and zen-like to fanciful and improvisational.Another link gives specifics on the physics involved in this process.
Thursday, January 3, 2008
OK, this one really isn't a sign, or even a joke. As I was installing my cousin's Yahoo DSL internet, I ran across this passage in the user agreement. Seriously. So I CAN'T use my Yahoo DSL software to operate my nuclear facility OR life support? Sheesh.