| To rotate, click on the DNA molecule, hold down and drag.
DNA's double helix holds the key to life. The secret discovered by Watson and Crick in 1953 is that there are four possible types of rung on the ladder formed by the double helix. There are A-T rungs, where adenine bonds to thymine, T-A rungs where thymine bonds to adenine, C-G rungs where cytosine bonds to guanine, and G-C rungs where guanine bonds to cytosine. No other combinations are possible due to the shape of the four substances. The outer helices of the DNA molecule, coloured blue on our model, are made up of a chain of circular sugar molecules, each bearing a phospate group. Biochemists call the helices "the sugar-phosphate backbone". There are about 2.85 billion rungs on the ladder of human DNA. The initial letters of the rungs spell out the sequence of the human genome, the blueprint for each generation of new life.
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The specimens behind the Natural History Museum
In London's Natural History Museum, oblivious to the extraordinary building I was in and unaware of the vast team of researchers who worked in it. Instead, I was transfixed by a glass case full of dead moths. On one side of the case was the trunk of a birch tree, covered in pale lichens. Dotted across it were silvery grey moths, whose colouration matched the tree so well that it took me a while to see them. All except one, which was so much darker than the others that it stood out clearly against the pale tree. As far as any passing bird was concerned, the hapless moth might as well have had 'eat me' printed across its wings. .
P.E. plan would divide sexes
A change to the law in October 2006 allows districts to offer single-sex classes as long as they're optional, and if they can prove a justifiable educational goal or purpose that's OK under the law. Even then, those offering single-sex classes are monitored by federal officials every two years to make sure they're following the law. Mettler said he thinks single-sex choices may push students to work harder during the two years of required P.E. Then boys may not be so stuck on impressing girls and vice versa. He has support: Mettler said representatives from Liberty, Highland and Stockdale high schools have told him P.E. teacher support at their schools is unanimous. But he also said his idea is just an idea, and he's still researching it.
York Regional Police search for missing 83-year-old man
Georgina, Ont. - York Regional Police seek the public's assistance in locating an 83-year-old missing man in the town of Georgina. Michael Chesterman wandered from his home Monday early morning, in the Old Homestead Road and Metro Road North area. His family began searching and called police when they could not locate him. Police believe Mr. Chesterman may be confused or disoriented. He is described as five-feet nine-inches, with a thin build and grey hair, which is balding on top. He was last seen wearing a black nylon coat and white running shoes. Anyone who may have seen him or who has information has been asked to call 1-866-876-5423 (ext. 7341), Crime Stoppers at 1-800-222-TIPS or leave an anonymous tip online at www.1800222tips.com.
Park Information
The Complete Series to DVD on September 25. From the producers of LOST and Alias (J.J. Abrams and Bryan Burk), and starring Barry Watson ("7th Heaven") as consummate bachelor Brian Davis, What About Brian is a charming emotional ensemble drama that critics called "breezy, bittersweet and infectious" - The Chicago Tribune A tight knit group of friends living in Los Angeles embrace the web of relationships with humor and hope while navigating through life. Brian, the only unattached member of his clique, must navigate the tricky and sometimes cruel dating world while trying to nail down a stable career. In Season 1, Brian holds out for true love, but there's one problem: his crush on best friend Adam's fianc Marjorie. Season 2 finds Brian heading down an altogether different road: in the dating fast-lane.
Your Say Topic
Waste of time Sahu Khan.The Aussie government has a travel advisory ban on Fiji informing all Australians of the dangers of holidaying in Fiji.It would be better if you could put ads in the paper informing tourists about the emergency decree in force.In particular the dangers of this type of decree and the self imposed powers that the corrupt military junta has to take away basic civil and human rights.Remember to advertise in big letters the beatings and killings of innocent civilians by Frank's corrupt Interim Council Doctor Mohammand Ahdemajeid of Ba (111 days and 8 hours ago) Dr Sahu can't needs to create a better image of Fiji by telling the truth first about the daylight robbery this military regime has done. It will be a waiste of TAX payers money for Dr Sahu Khan to try and promote a false image of Fiji abroad due to the current situation in the country.
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