(NewsTarget) -- New research published in the September issue of the journal Human Molecular Genetics has shown that the green tea extract epigallocatechin gallate (EGCG) may interfere with the accumulation of proteins in the brain that cause Huntington's disease.
The scales of older turtles may seem vague or disappeared as a result of daily wear and tear, and their shells can watch highlights, there are scratches and holes, and can even be chipped off. Finding the size or weight of a turtle is a next step to determine its age. Compare your stats with the standard turtle species. If your turtle is small, the chances are that the young one.
So to determine the age of sedimentary rock layers, researchers first have to find neighboring layers of Earth that include igneous rock, such as volcanic ash. These layers are like bookends -- they give a beginning and an end to the period of time when the sedimentary rock formed. By using radiometric dating to determine the age of igneous brackets, researchers can accurately determine the age of the sedimentary layers between them. Using the basic ideas of bracketing and radiometric dating, researchers have determined the age of rock layers all over the world. This information has also helped determine the age of the Earth itself. While the oldest known rocks on Earth are about 3.5 billion years old, researchers have found zircon crystals that are 4.3 billion years old [source: USGS]. Based on the analysis of these samples, scientists estimate that the Earth itself is about 4.5 billion years old.