Definition: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: Jack Perks/Alamy Stock Photo 
  
 Here’s a comforting thought. When you arrive home and open the front door or enter your bedroom, the spiders can hear you. 
  
 It has long been known that spiders can hear sounds via leg hairs that bend in response to vibrations arriving through the air or through solid objects such as floors or walls. But until now, we thought they could only hear airborne vibrations a few centimetres or “spider lengths” away at most. 
  
 It now seems that this same approach actually lets them hear sounds up to 5 metres away. 
  
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 Gil Menda at Cornell University in Ithaca, New York, and his colleagues were studying a type of jumping spider, Phidippus audax, that they assumed relied almost completely on sight and vibrations they can feel through other objects, such as leaves or floorboards. 
  
 But microelectrodes implanted in the spiders’ brains showed that neurons responded to sounds such as chairs scraping and people clapping even when the noises were made 3 to 5 metres away. 
  
 “We were very surprised,” says Menda. “Our studies extended the range of auditory sensitivity to more than 3 metres – over 350 body lengths – for our spiders.” 
  
 The team established that the spiders freeze when exposed to low-frequency sounds of about 80 to 400 hertz that resemble a low hum, or buzz. They discovered that this overlaps with the wingbeat frequency of predatory insects such as parasitoid wasps and flies, concluding that the hearing abilities they found in jumping spiders have evolved to help them avoid predators. 
  
 Wiggly hairs 
  
 Further experiments revealed that deformations in tiny hairs, or trichobothria, on the legs register the sounds. When Menda wiggled the hairs deliberately, the same neurons fired as when the spiders heard the sounds. The team also used isolation techniques – such as working in an echo-free chamber – to ensure that the spiders were not responding to vibrations felt secondary to the sound waves. 
  
 “All spiders have these hairs, so it seems likely this is something that lots of spiders can do, as opposed to something exclusive to jumping spiders,” says Menda’s colleague, Paul Shamble, now at Harvard University. “This result really offers a new perspective on the auditory world of spiders, since we now know they can hear at much greater distances.” 
  
 The team has started testing the hearing of other species, such as fishing and wolf spiders, all of which seem to have a similar ability. “Spiders can hear humans talking and walking, which is within the audible range,” says Menda. “When I see spiders at my house or anywhere else, I find myself trying different tones to see if they respond, and sometimes they do.” 
  
 We knew spiders could detect sounds, but there was always a question of how they were doing it, says George Uetz at the University of Cincinnati in Ohio, who has studied how spiders communicate in the past. Now we have another answer, he says. 
  
 “Not only do some species ‘hear’ by perceiving airborne sound through substrate surfaces like leaves or webs, but some ‘hear’ through sensory hairs that detect air movement,” he says. 
  
 Journal reference: Current Biology, DOI: 10.1016/j.cub.2016.08.041 ||||| Jumping spider. Credit: Gil Menda and the Hoy lab According to the standard textbooks, spiders are acutely sensitive to airborne vibrations from nearby sources. That is, they are supposed to respond to sounds and "hear," but only when the sound is coming from a few centimeters or so away. Now, researchers reporting in Current Biology on October 13 have found that jumping spiders, and most likely other spiders too, can actually hear sounds over much greater distances. 
  
 The findings offer a new perspective on the auditory world of spiders, the researchers say. 
  
 "The sensory world of the tiny jumping spider was thought to be dominated by sight and tactile touch," says Paul Shamble, who conducted the work along with colleagues in Ron Hoy's lab at Cornell University and has since moved to Harvard. "Surprisingly, we found that they also possess an acute sense of hearing. They can hear sounds at distances much farther away than previously thought, even though they lack ears with the eardrums typical of most animals with long-distance hearing." 
  
 Shamble says that their discovery was a lucky accident. He and colleagues including Gil Menda, also at Cornell, had previously devised a new method for making neural recordings from the brains of jumping spiders and were using the technique to explore how jumping spiders process visual information. 
  
 "One day, Gil was setting up one of these experiments and started recording from an area deeper in the brain than we usually focused on," Shamble recalls. "As he moved away from the spider, his chair squeaked across the floor of the lab. The way we do neural recordings, we set up a speaker so that you can hear when neurons fire—they make this really distinct 'pop' sound—and when Gil's chair squeaked, the neuron we were recording from started popping. He did it again, and the neuron fired again." 
  
 At the time, Shamble was in the main lab, just outside the recording room. Menda called him in and the two got to talking about how spiders hear. 
  
 Jumping spider. Credit: Gil Menda and the Hoy lab 
  
 "We started discussing the details about how spiders can only hear things close by and, to demonstrate, Paul clapped his hands close to the spider and the neuron fired, as expected. He then backed up a bit and clapped again, and again the neuron fired." 
  
 Soon, Menda and Shamble were standing outside the recording room, three to five meters from the spider, amazed, as the spider's neuron continued to respond to their clapping. Based on everything they thought they knew, it shouldn't have been possible. 
  
 Further study showed that the jumping spiders' hearing is most sensitive to frequencies that would enable them to hear the wingbeats of their parasitoid wasp enemies. Behavioral experiments showed that the jumping spider responds to such sounds by freezing—a common startle response. 
  
 The researchers also produced the first recordings of acoustically responsive neural units in the jumping spider brain to show that their brains respond to sounds over distances of more than three meters. They also found that direct mechanical stimulation of hairs on the spiders' forelegs was enough to generate a response in acoustically sensitive neurons. 
  
 "We found that when we shook single sensory hairs back and forth—these are the same hairs that are known to respond to sounds originating close to the animal—we also got responses," Shamble says. "This suggests that these hairs are how spiders are registering far-away sounds." 
  
 Shamble and Menda say that the new findings change scientists' view on the world that spiders live in. "In the movies, Spiderman has this strange, additional 'spidey sense' that helps him sense danger—it turns out the real-life spidey sense of spiders might actually be hearing!" Menda said. 
  
 The researchers are now recording from the brains of fishing spiders and wolf spiders, among several other more interesting members of this large and diverse group of invertebrates, to test their hearing too. 
  
 Explore further: Researchers record sight neurons in jumping spider brain (w/ Video) 
  
 More information: Current Biology, Shamble et al.: "Airborne Acoustic Perception by a Jumping Spider" www.cell.com/current-biology/f … 0960-9822(16)30985-X , dx.doi.org/10.1016/j.cub.2016.08.041 
  
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 The better to hear you with, my dear. (Gil Menda and the Hoy lab) 
  
 Forget being a fly on the wall — for serious snooping, you might rather be an arachnid. Scientists once thought that the eight-legged creatures could only really perceive their world through sight and touch, only ever “hearing” vibrations that came from a few centimeters away or less. But a group of clapping, noisemaking researchers is changing all that. According to their research, a jumping spider could be eavesdropping on you at this very moment. 
  
 It all started with a squeaky chair and a bit of new technology. Gil Menda of Cornell University was helping his colleague, Paul Shamble, set up a visual experiment with spiders using a new method that can detect their neural activity. “We usually ask the spider a question, and the brain answers us,” said Menda of the technique, which allows researchers in the Hoy Lab at Cornell to measure how neurons inside spiders' brains respond to certain stimuli. 
  
 [This virus may have stolen deadly DNA from black widow spiders] 
  
 The setup was designed to make a popping sound whenever neurons fired — and when Menda moved his chair, he unexpectedly heard a long sound from his research rig. He asked Shamble to clap his hands from across the room. 
  
 They both ended up outside the recording room, listening as the speakers (and the spiders' neurons) fired again and again. A new experiment was born. 
  
  
  
 (Gil Menda and the Hoy lab) 
  
 For years, scientists thought that jumping spiders and their kin couldn't really hear. Though they have acute visual systems that let them judge both distances and depth to hone in on prey and escape predators, they lack ears and eardrums. Instead, they hear using supersensitive sensory hairs that were thought to vibrate only in response to the movement of air molecules or shifting surfaces nearby. 
  
 The fact that the clap-happy spider could sense sound so far away triggered the researchers' own spidey sense. Could the creatures in fact hear not just faraway sounds, but different frequencies, too? 
  
 The researchers describe what happened next in an article published Thursday in the journal Current Biology. They put spiders in a recording arena engineered to have minimal acoustic reflections or echoes. Then they played sounds at different frequencies and recorded the spiders' responses. 
  
 [Why more than 30 kinds of spiders engage in ‘bondage’] 
  
 (Gil Menda and the Hoy lab) 
  
 When the team played sounds that matched the frequency of the beating wings of wasps — common jumping spider predators — the spiders froze, a typical response to such a threat. Further experiments tested neural feedback of spiders that were exposed to sounds at different frequencies. The team confirmed that the sensory hairs were causing the responses with tests that produced neural responses when a single sensory hair was shaken back and forth. 
  
 Remember how spiders were once thought to only hear close-by sounds? The new experiment blew that concept out of the water. Now, Menda and his colleagues think that jumping spiders can hear sounds up to three meters away — over 350 body lengths. And the sounds they seem designed to hear correspond to those produced by flying insects that could do them harm. 
  
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 “This is real, and it's not only with jumping spiders,” said Menda, who's moved on to testing the same responses in other kinds of spiders. So far, at least five species seem to have the response — which makes sense, given that all spiders have sensory hairs. The other spiders Menda has studied are all sensitive to different frequencies, which opens up evolutionary questions about whether spiders' newly discovered hearing skills developed due to environmental threats. 
  
 The findings could change the ways in which researchers work with spiders in the future. Menda points out that until the new finding, researchers had no idea the sounds they made could influence spider experiments. Now, spider behaviorists will need to change their ways to avoid sullying their results with sound. 
  
 Studying spiders' sense of sound could help humans one day, too: Menda said that a better understanding of how spiders hear could lead to a better sense of how they evolved, inspire micro-robotics, and even help researchers make more sensitive microphones and hearing aids that mimic spiders' extraordinary senses. 
  
 Has spending time making spiders freeze with sound changed Menda's take on the eavesdropping eight-legged animals? Absolutely. “They can hear everything we do,” said Menda, who used to bring a wary eye to “Spider-Man” movie sessions with his kids. “I used to laugh at [the movies], because spiders can't hear sounds. Well, guess what? They can.” So next time you've got something to say about a spider, watch your words — they may not have ears, but they definitely can listen in. 
  
 Erin Blakemore (@heroinebook) is a freelance journalist from Boulder, Colo. She is the author of “The Heroine’s Bookshelf” (Harper). 
  
 Read more: 
  
 How many types of bugs live in your house right this minute? Science weighs in. 
  
 The moon is a more violent place than we thought 
  
 66 million-year-old bird fossil is the oldest squawk box ever found 
  
 This virus may have stolen deadly DNA from black widow spiders |||||
Output:
If you're already scared of spiders, you're not going to like this next part. A new study published Thursday in Current Biology found that spiders—specifically a species of jumping spider—can hear sounds from further than 10 feet away. Previously, scientists believed spiders, which lack eardrums, could only sense vibrations in the air from a few centimeters away, Phys.org reports. Researchers at Cornell University accidentally discovered this heretofore unknown ability thanks a squeaky lab chair. They were doing neural recordings of a spider's brain to study its sense of sight when they noticed neurons firing in response to the chair. The same neurons would fire in response to clapping from up to 16 feet away. The researchers have since gone on to find similar abilities in at least five other species of spider, and they believe many others have similar capabilities, the Washington Post reports. That means spiders can hear people "talking and walking," researcher Gil Menda tells New Scientist. Researchers believe the spiders are using sensory hairs on their front legs to sense vibrations moving through the air. These hairs are attuned to different frequencies in each spider. In the original jumping spider, they triggered a response in reaction to frequencies that matched the beating of a predatory wasp's wings. "In the movies, Spider-Man has this strange, additional 'spidey sense' that helps him sense danger—it turns out the real-life spidey sense of spiders might actually be hearing," Menda tells Phys.org. (To avoid widows' kiss of death, male spiders chase young girls.)