Often mistaken for insects, spiders actually belong to a
different classification of creatures, called arachnids.
They're insects' worst enemies. Although a few
species, such as the black widow and the brown
recluse, are dangerous, the majority are harmless to
humans. Moreover, they can be helpful. Pest control,
for example is just one of the many ways spiders can
help us. Because they kill far more pests than
commercial insecticides do. In the future, perhaps if
farmers employ armies of spiders to protect their fields,
our grocery bills will be lower and our soil and water
and food will have fewer pesticide remains.