PITTSBURGH — The emotional story of a ring - a promise fulfilled - and a push to bring happiness back to the Tree of Life synagogue. It’s one family’s emotional plan to make sure their loved ...

Each ring on the sequoia's surface represents one year of the tree's life, so scientists can ascertain the age of the tree by counting how many rings it has. Wing says that there is always a bit ...

Every spring in much of the world, the cells under a tree’s bark wake up and start to divide. This forms a visible ring marking each year of the organism’s life. In a tree sensitive to ...