Spiders that hunt at night often have a special layer at the back of their big eyes. It acts like a mirror to bounce light back into the eyes. On a dark night, this reflected light makes the spider's eyes seem to glow!
That sinking feeling
That sinking feeling New research reports that the practice of planting
trees to soak up the greenhouse gas, carbon dioxide, may be based
on dangerous delusion. Scientists fear that the new planned forests
will become saturated with carbon and that they will therefore
begin returning most of their carbon to the atmosphere. This would
temporarily accelerate global warming and the end result would be
that there is no overall reduction in carbon dioxide levels. Many
countries, including the USA, which produces about a quarter of the
world's carbon emissions, may be mistakenly relying to a large
degree on the supposed benefits of tree planting to meet their
world carbon budget targets. 23 OCTOBER 1999, P. 20-21
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