In an ant colony, ants communicate by tapping their antennae together.
Canine cops
Canine cops In Sweden, specially trained dogs are being used
to find mercury in places such as in areas which house old
industrial equipment, in laboratories and in drains. The dogs are
trained to sniff out mercury so that it can be safely disposed of.
This is part of a program initiated by the Swedish government to
clean up all old stocks of mercury. 27 NOVEMBER 1999, P. 23
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