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.
A quake-spotting gene?
A quake-spotting gene? Professor Mitsuaki Ota of Azabu University in
Japan is looking for an "earthquake gene" in pet animals. Some pets
acted strangely before the big earthquake which hit Japan in 1995,
while others were undisturbed. Professor Ota is comparing the DNA
of pets which reacted to the coming earthquake and pets which were
unaffected in an attempt to discover a piece of DNA which could
account for earthquake-warning behaviour. MAY 18, 2000
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