12 Awesome Spider Facts


Ask most people their opinion of spiders, and they’ll tell you that the arachnids are super creepy. And that might be kinda true, but the fact of the matter is, we need them as much as we need bees: Spiders are the dominant non-vertebrate predators in most exosystems, and without them, insect numbers would skyrocket. Human populations would also be much smaller—or even nonexistent—because the bugs would devour our crops, according to Norman Platnick, Curator Emeritus of the Division of Invertebrate Zoology at the American Museum of Natural History, and curator of Spiders Alive!, which opens tomorrow at the museum.

“It is a fact of reality that some of our visitors are likely to arrive with some fear of spiders, and I can understand that, to an extent,” he says. “I personally am afraid of snakes. But I regard that as a rational fear—about half of the snakes on this planet can actually hurt you. Being afraid of spiders is not rational in that sense. And so we hope to show why such arachnophobia is basically irrational, and that spiders are actually handsome, fascinating creatures that are extremely beneficial to humans.”

Platnick also hopes that visitors to the exhibition will come away with the knowledge that the study of spider diversity is an active field, with much to still be discovered. “Arachnologists have identified almost 45,000 different kinds of spiders at this point,” he says, “[but] that probably represents, at most, about half of the actual diversity of the group, and the numbers are growing very very quickly.”

Spiders Alive! showcases 16 spider species (plus two scorpions and a vinegaroon!) and features live demonstrations and a model of a trap door spider that's 50 times life size—and you can climb on it! Here are a few things we learned from an early visit.

1. Brown recluse venom destroys human tissue, but it has very little effect on rats and mice. Rabbits, meanwhile, are super sensitive: They can develop a wound from as little as 15 micrograms of venom.

2. Spider fossils are hard to find because the animals’ exoskeletons are relatively soft. For every 1000 insect fossils discovered, there’s only one spider.

3. We think of spiders as solitary creatures, but some 20 species work together to survive—including the African funnel-web spider, which shares its web with hundreds of its brethren.

4. This trick is not for the arachnophobic: If you’re walking around at night and want to find any wolf spiders that might be around, use a flashlight—their eyes will reflect the light back at you, like a less cute cat.

5. Tarantulas get their common name from an illness that swept through Taranto, Italy, in medieval times; people thought the illness was caused by the bite of a large-but-harmless spider. To be cured, the afflicted would do a dance called “tarantella” until they were completely exhausted. That poor spider became so well-known that when people settled in the New World, they called any large, hairy spider they came across a tarantula.

Photo by Erin McCarthy

6. Many tarantulas in North and South America defend themselves by using their hind legs to kick off the urticating hairs on their abdomens. The hairs are sharp and irritating, and become embedded in a predator’s skin, eyes, and respiratory tract, hopefully giving the spider time to get away. How can you tell if a tarantula has been using its hairs? Look for a tell-tale bald spot on its abdomen.

7. Despite its name, the Goliath bird eater only rarely eats birds! Instead, this spider—one of the biggest in the world—more often dines on snakes, mice, and frogs.

8. Not all spiders build webs, but all spiders make silk; it emerges from flexible spinnerets, which can be lifted, lowered, and twisted and, in some cases, moved independently, allowing the spider to direct the flow of the silk without moving its whole body. Some use silk to protect their eggs, sail through the air, or get a mate; one species, Argyroneta aquatica, even uses it to survive underwater! The spider builds a dome-shaped web with its silk and stores air bubbles there that it has collected on trips to the surface. It can stay underwater for as long as a day before having to return to the surface.

9. We’ve used spider silk for some pretty incredible things: In the 1800s, travelers saw Solomon Islanders using fishnets made of the material, and in 1943, the U.S. Army used silk from the black widow spider to make crosshairs on sighting devices. More recently, scientists used spider silk as a scaffold for growing human skin cells.

10. Orb webs have three parts: the frame, or foundation, which is the first thing a spider builds; the radii, which come out from the center like the spokes of a bicycle and transmit vibrations from prey; and the catching spiral, the sticky part of the web, which can stretch without breaking, making it hard for insects to escape. Some spiders take their webs down often—even daily!

11. Charlotte A. Cavatica from Charlotte’s Web is named after a common orb weaver, Araneus cavaticus. White consulted an expert at AMNH for help when researching the book.

Photo by Erin McCarthy

12. With well over 1 million specimens, AMNH has the largest research collection of spiders in the world. Unlike insects, which are typically pinned, the arachnids are stored in alcohol so they don’t dry out, which would render the specimens useless.


Disturb one of these arachnids, and they'll shoot a foul smelling spray at you from their abdomens. Don't say we didn't warn you!

All photos courtesy of AMNH unless otherwise noted.

Authorities Want This Roadside Bear Statue in Wales Removed Before It Causes More Accidents

There are no real bears in the British Isles for residents to worry about, but a statue of one in the small Welsh town of Llanwrtyd Wells has become a cause of concern. As The Telegraph reports, the statue is so convincing that it's scaring drivers, causing at least one motorist to crash her car. Now road safety officials are demanding it be removed.

The 10-foot wooden statue has been a fixture on the roadside for at least 15 years. It made headlines in May of 2018 when a woman driving her car saw the landmark and took it to be the real thing. She was so startled that she veered off the road and into a street sign.

After the incident, she complained about the bear to highways officials who agreed that it poses a safety threat and should be removed. But the small town isn't giving in to the Welsh government's demands so quickly.

Wooden bear statue.

The bear statue was originally erected on the site of a now-defunct wool mill. Even though the mill has since closed, locals still see the statue as an important landmark. Llanwrtyd Wells councilor Peter James called it an "iconic gateway of the town," according to The Telegraph.

Another town resident, who wished to remain anonymous, told The Telegraph that the woman who crashed her car had been a tourist from Canada where bears are common. Bear were hunted to extinction in Britain about 1000 years ago, so local drivers have no reason to look out for the real animals on the side of the road.

The statue remains in its old spot, but Welsh government officials plan to remove it themselves if the town doesn't cooperate. For now, temporary traffic lights have been set up around the site of the accident to prevent any similar incidents.

[h/t The Telegraph]

10 Scientific Benefits of Being a Dog Owner

The bickering between cat people and dog people is ongoing and vicious, but in the end, we're all better off for loving a pet. But if anyone tries to poo-poo your pooch, know that there are some scientific reasons that they're man's best friend.


Dog snuggling on a bed with its person.

If cleaning commercials are to be believed, humanity is in the midst of a war against germs—and we shouldn't stop until every single one is dead. In reality, the amount of disinfecting we do is making us sicker; since our bodies are exposed to a less diverse mix of germs, our entire microbiome is messed up. Fortunately, dogs are covered in germs! Having a dog in the house means more diverse bacteria enters the home and gets inside the occupants (one study found "dog-related biodiversity" is especially high on pillowcases). In turn, people with dogs seem to get ill less frequently and less severely than people—especially children—with cats or no pets.


Child and mother playing with a dog on a bed.

While dog dander can be a trigger for people with allergies, growing up in a house with a dog makes children less likely to develop allergies over the course of their lives. And the benefits can start during gestation; a 2017 study published in the journal Microbiome found that a bacterial exchange happened between women who lived with pets (largely dogs) during pregnancy and their children, regardless of type of birth or whether the child was breastfed, and even if the pet was not in the home after the birth of the child. Those children tested had two bacteria, Ruminococcus and Oscillospira, that reduce the risk of common allergies, asthma, and obesity, and they were less likely to develop eczema.


Woman doing yoga with her dog.

Everything about owning a dog seems to lend itself to better heart health. Just the act of petting a dog lowers heart rate and blood pressure. A 2017 Chinese study found a link between dog ownership and reduced risk of coronary artery disease, while other studies show pet owners have slightly lower cholesterol and are more likely to survive a heart attack.


Person running in field with a dog.

While other pets have positive effects on your health as well, dogs have the added benefit of needing to be walked and played with numerous times a day. This means that many dog owners are getting 30 minutes of exercise a day, lowering their risk of cardiovascular disease.


Woman cuddling her dog.

Dog owners are less likely to suffer from depression than non-pet owners. Even for those people who are clinically depressed, having a pet to take care of can help them out of a depressive episode. Since taking care of a dog requires a routine and forces you to stay at least a little active, dog owners are more likely to interact with others and have an increased sense of well-being while tending to their pet. The interaction with and love received from a dog can also help people stay positive. Even the mere act of looking at your pet increases the amount of oxytocin, the "feel good" chemical, in the brain.


Large bulldog licking a laughing man.

Not only does dog ownership indirectly tell others that you're trustworthy, your trusty companion can help facilitate friendships and social networks. A 2015 study published in PLOS One found that dogs can be both the catalyst for sparking new relationships and also the means for keeping social networks thriving. One study even showed that those with dogs also had closer and more supportive relationships with the people in their lives.


Man high-fiving his dog.

Your dog could save your life one day: It seems that our canine friends have the ability to smell cancer in the human body. Stories abound of owners whose dogs kept sniffing or licking a mole or lump on their body so they got it checked out, discovering it was cancerous. The anecdotal evidence has been backed up by scientific studies, and some dogs are now trained to detect cancer.


Woman working on a computer while petting a dog.

The benefits of bringing a dog to work are so increasingly obvious that more companies are catching on. Studies show that people who interact with a pet while working have lower stress levels throughout the day, while people who do not bring a pet see their stress levels increase over time. Dogs in the office also lead to people taking more breaks, to play with or walk the dog, which makes them more energized when they return to work. This, in turn, has been shown to lead to much greater productivity and job satisfaction.


Man running in surf with dog.

The kind of dog you have says a lot about your personality. A study in England found a very clear correlation between people's personalities and what type of dogs they owned; for example, people who owned toy dogs tended to be more intelligent, while owners of utility dogs like Dalmatians and bulldogs were the most conscientious. Other studies have found that dog owners in general are more outgoing and friendly than cat owners.


A young boy having fun with his dog.

Though one 2003 study found that there was no link between pet ownership and empathy in a group of children, a 2017 study of 1000 7- to 12-year-olds found that pet attachment of any kind encouraged compassion and positive attitudes toward animals, which promoted better well-being for both the child and the pet. Children with dogs scored the highest for pet attachment, and the study notes that "dogs may help children to regulate their emotions because they can trigger and respond to a child's attachment related behavior." And, of course, only one pet will happily play fetch with a toddler.

A version of this story originally ran in 2015.


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