When ice covers lakes, there is less oxygen to breathe, and most fish sink to the bottom. They remain very quiet but awake. Carp, however, flap their tails to cover themselves with mud and they go to sleep. When the lake ice melts and the oxygen levels rise they awaken.
Police investigate killer rock
Police investigate killer rock A forensic geologist is analysing a rock that
killed a woman after it fell off a dump truck. Police say that by
identifying where the rock came from in the city, they can locate
the truck that was carrying it. The geologist will compare the
killer rock to samples of rock from various sites and try to match
them. FEBRUARY 7, 2001
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