A subgroup of air-breathing, terrestrial (land) arthropods, spiders are not actually insects but rather belong to the Class Arachnida (a.k.a. arachnid). Besides spiders, other arachnids include ...

We share the Earth with around 21 quadrillion spiders! So, let’s take a closer look at 27 facts about spiders that will make your skin crawl.

Spiders are some of the most common creatures we share our homes with. While they may seem scary at first, most house spider species are harmless and even helpful, keeping pest insects under control.