I've always found spiders to be fascinating with their eight legs and venom injecting fangs.
I am scared of spiders but I know they eat a lot of insects. They are good to have around.
I definitely appreciate them eating all the bugs. There are found worldwide except for Antartica, air or sea.
Yeah, I could see Antarctica being too cold for them. I am fascinated at how they can build webs. What an amazing feat.
Another surprising thing is that they are the order with the seventh most species in it compared to other organisms. 
I know there are lots of different kinds of spiders. Some tiny ones and some huge ones.
There are at least 45,700 spider species and 113 families of species. Its crazy how diverse they are and how they have adapted so many different traits for survival. 
That is absolutely insane. I had no idea there were so many species.
cephalothorax. Unlike most arthropods, spiders have no extensor muscles in their limbs and instead extend them by hydraulic pressure.
Their abdomens bear appendages that have been modified into spinnerets that extrude silk from up to six types of glands. Spider webs vary widely in size, shape and the amount of sticky thread used. It now appears that the spiral orb web may be one of the earliest forms, and spiders that produce tangled cobwebs are more abundant and diverse than orb-web spiders. Spider-like arachnids with silk-
Spider
Spiders (order Araneae) are air-breathing arthropods that have eight legs and chelicerae with fangs able to inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every habitat with the exceptions of air and sea colonization. , at least 48,200 spider species, and 120 families have been recorded by taxonomists. However, there has been dissension within the scientific community as