Spiders are ancient animals with a history going back many millions of year you can discover the highly developed range of tools spider us efor sensing the world,catching and eating foods ,mathing and protecting themselves, and also they make silk.There are thousands of special of spiders in Australia ,but few are considered dangereous according to me , they are magnificent constructors or engineers and i believe that people had learnt lots of things from there webs while doing the constructions.
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