Male giraffes fight each other by 'necking'! They push their long necks against each other, bending and twisting them in order to win the fight by a show of strength. Many animals fight this way, including snakes, insects and crabs. Competing in this way allows animals to find out who's boss while protecting themselves from injury. The strongest wins and the loser just has to go away.
Inside information
Inside information A new method of testing the toxicity of pesticides
and fungicides is being investigated by an agrochemical
manufacturer. The method uses small chips called biosensors to
detect toxicity. Biosensors are usually either small cultures of an
organism's cells, or a small chip coated with fragments of genes
from an organism. The effect of chemicals on those genes or cells
is measured to determine whether the chemicals are toxic to the
organism. 13 MARCH 1999, P. 17
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