Spiders are arachnids, a class of joint-legged invertebrates that also includes scorpions, ticks, and mites.
There are over 48,000 known species of spiders, and they are found in almost every habitat on Earth, from rainforests to deserts, except for the coldest regions like Antarctica.
Spiders are known for their ability to spin silk, which they use for various purposes such as building webs, trapping prey, and protecting their eggs.