Spider silk is stronger than steel.

Illustration by Diana Gerstacker; Photo by Yogesh Gosavi/ Unsplash

Despite being thinner than human hair and lighter than cotton, spider silk is stronger than steel — and it isn’t even close. According to Science magazine, the insect-trapping, egg-protecting material is a full five times stronger than steel of the same diameter. It’s also highly elastic and can hold its strength at extreme temperatures, making it one of the most versatile substances in the world.

Spiders are insects.

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Along with such creepy-crawlies as scorpions and mites, spiders belong to the Arachnida class and are thus arachnids, not insects. The main difference? Most adult arachnids have eight legs rather than six and don’t have wings or antennae.

Only about half of all spiders spin webs, but all of them produce silk — which is as lucky for us as it is for them, considering how many uses it has. Ancient Greek soldiers used cobwebs to reduce bleeding, and it’s even been used in body armor developed for the U.S. military. So the next time you get scared after seeing a spider, just think: Its silk may one day save a life.

Numbers Don't Lie

Number of known spider species

45,000

Types of silk female orb weaver spiders can produce

Number of spiders whose silk was used to create a cape for a 2012 art exhibit

1.2 million

Highest sale price of “The Amazing Spider-Man #1”

$450,000

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______ is the world’s largest spider by mass.

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The goliath birdeater (Theraphosa blondi) is the world’s largest spider by mass.

You don’t really swallow eight spiders a year in your sleep.

There’s a good chance you’ve heard this common misconception about spiders crawling into your mouth while you snooze, but it’s just that: an urban legend. It simply doesn’t make sense on a biological or behavioral level for us or our eight-legged friends, who are highly sensitive to vibrations and therefore not inclined to approach a sleeping (and often snoring) human — especially since it wouldn’t end much better for them than it would for us.