Gaia and Selfish Genes
The origin of life on Earth and its subsequent evolution into a sentient being is among the most complex
and controversial of any in the world of science. The question as to which level evolution primarily
operates on has many possible answers, with adamant supporters for each. Examine two diametrically
opposed views and decide for yourself.
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Abnormalities in the Determination of Right-Left Symmetry
It is simply amazing that the fetal development of a human child, a biological machine with hundreds
of billions of interworking parts, usually proceeds error free. When developmental problems do arise
however, few are as enlightening into the process of embryogenesis as those involving mistakes in the
detemination of the child's left-right axis.
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