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!
All at sea
All at sea A new survey has found that levels of heavy metals
dissolved in water around the piles of debris piled on the sea bed
near oil rigs exceed environmental safety limits. The heavy metals
are leaching out of the piles of waste, which had previously been
assumed to be safe. 28 NOVEMBER 1998, P. 24
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