."Stop the killing in Tibet!" several hundred protesters shouted after the clash with police, who had tried to contain the crowd after some picketers began throwing the rocks.
Original article:It now appears that virtually all cells in the body have their own ticking circadian clock, including skin cells
Abstract:Research in the Proceedings of the National Academy of Sciences shows that skin cells can be used to measure the speed of a person's body clock.
Some (easy to play with) circadian oscillator models(search for "CircClock") could be found in BioModels Database. There are couple of open source command line "model players" to do the simulation:Human beings exhibit wide variation in their timing of daily behavior. We and others have suggested previously that such differences might arise because of alterations in the period length of the endogenous human circadian oscillator. Using dermal fibroblast cells from skin biopsies of 28 subjects of early and late chronotype (11 "larks" and 17 "owls"), we have studied the circadian period lengths of these two groups, as well as their ability to phase-shift and entrain to environmental and chemical signals. We find not only period length differences between the two classes, but also significant changes in the amplitude and phase-shifting properties of the circadian oscillator among individuals with identical "normal" period lengths. Mathematical modeling shows that these alterations could also account for the extreme behavioral phenotypes of these subjects. We conclude that human chronotype may be influenced not only by the period length of the circadian oscillator, but also by cellular components that affect its amplitude and phase. In many instances, these changes can be studied at the molecular level in primary dermal cells.
Yet:a report in BMC Biology uses genetic evidence to show that there may be at least six species of giraffe in Africa."...
"Using molecular techniques we found that giraffes can be classified into six groups that are reproductively isolated and not interbreeding," David Brown, the lead author of the study and a geneticist at the University of California Los Angeles (UCLA), told BBC News.
"The results were a surprise because although the giraffes look different, if you put them in zoos, they breed freely."
'Cause you know, more people die from Taliban than from drugs.The operation will not touch Helmand's poppy fields, which supply much of the world's opium and its more potent derivative, heroin. That could antagonize the 2 million farmers whose livelihoods depend on growing poppy, something the alliance wishes to avoid.
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