Roughly 95% of the spiders you find in your home were either born in or have adapted to life indoors. Chances are they will die if you put them outside.
Spiders' legs curl up when they die because they don't have muscles in their legs, they extend them using a system of hydraulics powered by their blood pressure.
Black widow bites haven't been responsible for a death in a hundred years
A spider’s silk is stronger than steel.
Spiders mostly have transparent blood
If the world's population of spiders worked together, they could theoretically eat every human on Earth in one year.
Spiderwebs come out as liquid which hardens as it makes contact with the air and becomes very strong.
Daddy Long Legs is said to be the most venomous spider in the world but harmless because their fangs are too small to bite. This is false three times. It's not venomous, has plenty long fangs, and not even a spider.
Some spiders disguise themselves as ants by pretending their two front legs are antennae (this is called myrmecomorphy)
The female orb-web spider often eats the male during sex. However, the male's penis is detachable and can still finish the job.
Spiders cannot digest solid food. Before they can eat their prey, they must turn their meal into a liquid form.
Spiders don't have muscles in their legs. They use hydraulics. When they die, their legs curl up because the blood pressure is gone.
Spiders don't have ears. Instead, they use their legs to hear.
Spiders are not insects. Spiders have eight legs. They are related to scorpions and belong to the arachnid family.
The black lace-weaver spider will drum on her web to call her babies to come and eat her alive
Spiders are not insects. They are arachnids.
Spiders, in part, store their memories and cognitive abilities in their webs. Destroying a web partially erases a spider's memory.
The Bolas spider uses a long string of silk with a sticky blob at the end to swing at, and catch, passing moths.
Spiders can use Earth Electric Field to fly hundreds of miles; They've been found 2.5 miles up in the air, and 1,000 miles out in the sea.
Spiders are not that dangerous --- you're more likely to be killed by a champagne cork than by a poisonous spider