Red worms or manure worms can grow to about 5-7 centimetres (3 inches) long and will eat their own weight in garbage every 24 hours. When worms are used in composting it is called vermicomposting.
What's wrong with the right whale?
What's wrong with the right whale? Despite having been protected from hunting since
1937, the population numbers of the endangered northern right whale
have not recovered. Biologists now say that it is possible that the
northern right whale could be extinct within 200 years. According
to researchers, one of the main reasons that the number of northern
right whales are not increasing is that many whales become
entangled in fishing gear, or have collisions with ships and die.
The whales should be able to hear noise from ships and avoid
collisions, but they do not seem to be aware of the danger
associated with the noise. Another possibility could be that the
whales are not reproducing as often as they once did. There are
also concerns that a reduction of genetic diversity due to
inbreeding because of small population numbers could be a cause.
Environmental changes in the whales' habitat could also be a
contributory factor. Efforts to try and preserve the northern right
whale include monitoring shipping lanes in a effort to try and
avoid collisions between ships and whales, and patrolling areas
frequented by the whales to find any that are entangled in fishing
gear so attempts can be made to free them before they
die. 6 NOVEMBER 1999, P. 38-42
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