The next time you see a tree stump take a closer look at its rings. Every year most trees produce a light-coloured ring of spring growth and a dark-coloured ring of summer growth. If you count only one ring not both rings, you will be able to tell how old the tree was when it was cut down.
Food For Thought
Food For Thought Your mother is right, eating fish does make you
smarter! Fish contains high levels of a fatty acid (DHA) that helps
maintain the flexibility of cell membranes, making it easier for
brain and nerve cells to communicate. High levels of DHA are linked
to improved memory, while low levels are found in people with
Alzheimers and attention-deficit disorders. It has also been shown
that people who eat a lot of fish suffer from less
depression. MARCH 12, 2001
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