These 1,700-year-old aqueducts built by the Nasca people in Peru are an engineering marvel
Many of these pre-Inca structures are still in use today. Here's how they work.

The reason for the strange spiral shapes was partially a mystery until 2016.
From above, the Cantalloc Aqueducts look like an artistic installation of some sort, strings of aesthetically pleasing spirals lined up in perfect rows. But these pre-Inca-era creations have a perfectly practical purpose.
The Cantalloc Aqueducts are the best known part of the aqueduct system built by the Nasca (also spelled Nazca) people some 1,700 years ago in the desert of southern Peru. Due to the scarcity of water in this region—droughts here can last for years—the Nasca relied on getting water from the underground water table. But they didn't just create traditional wells to access the aquifer. They constructed an elaborate—yet brilliantly simple—system to channel water from the aquifer wherever they wanted it to go.
The spiral structures, called ojos ("eyes" in Spanish), are made of stone and wood up to 45 feet (15 meters) deep, and they connect to a series of underground aqueducts and surface channels (known collectively as puquios) that irrigate the arid landscape for farming and provide water for domestic use. Up until 2016, it was assumed the ojos were used as wells and access points for maintenance of the aqueducts. But Rosa Lasaponara and others from the Institute of Methodologies for Environmental Analysis in Italy discovered another reason for their shape.
Using satellite imagery to get a clear picture of the entire puquios and how the water was irrigated, Lasaponara and her team found that the spiral-shaped holes actually funnel wind down into the underground channels, helping push the water through the aqueducts like a pump.
Lasaponara's study also provided insight into the age of the system, which many had believed had been built by the Spanish. Because the structures are made from the materials from the local terrain, they can't be carbon dated. There is no written record from the Nasca in that time period, but the settlements the channels ran to provide strong evidence for Nasca origin.
It's a feat of hydraulic engineering that required an advanced understanding of how land, water and air work together, and the fact that most of these ojos are still in use today is a testament to the skills of the ancient people in this area of Peru.
The Nasca Aqueducts were submitted to be named a UNESCO World Heritage Site in 2019 and are currently on the organization's "tentative" list. As the submission on the UNESCO website states:
"This system was built in the middle of one of the driest and most arid desert territories of the world, where there is no surface water during most of the year. In this context, the water obtained by means of ingenious aqueducts serves not only for human consumption but also to irrigate the crop fields, with which fertile oases were created in the middle of the immense desert.
The Nasca Aqueducts were made based on advanced knowledge of geology and hydrology and since its construction, almost two thousand years ago, it has been used permanently by the societies that succeeded its builders and is still in operation until today."
Learn more about the Nasca aqueducts here.
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There's a reason why some people can perfectly copy accents, and others can't
Turns out, there's a neurodivergent link.
A woman in black long sleeve shirt stands in front of mirror.
Have you ever had that friend who goes on vacation for four days to London and comes back with a full-on Queen's English posh accent? "Oooh I left my brolly in the loo," they say, and you respond, "But you're from Colorado!" Well, there are reasons they (and many of us) do that, and usually it's on a pretty subconscious level.
It's called "accent mirroring," and it's actually quite common with people who are neurodivergent, particularly those with ADHD (Attention Deficit Hyperactivity Disorder). According Neurolaunch, the self-described "Free Mental Health Library," "Accent mirroring, also known as accent adaptation or phonetic convergence, is the tendency to unconsciously adopt the accent or speech patterns of those around us. This linguistic chameleon effect is not unique to individuals with ADHD, but it appears to be more pronounced and frequent in this population."
Essentially, when people have conversations, we're constantly "scanning" for information—not just the words we're absorbing, but the inflection and tone. "When we hear an accent, our brains automatically analyze and categorize the phonetic features, prosody, and intonation patterns," writes Neurolaunch. For most, this does result in copying the accent of the person with whom we're speaking. But those with ADHD might be more sensitive to auditory cues. This, "coupled with a reduced ability to filter out or inhibit the impulse to mimic…could potentially explain the increased tendency for accent mirroring."
While the article explains further research is needed, they distinctly state that, "Accent mirroring in individuals with ADHD often manifests as an unconscious mimicry of accents in social situations. This can range from subtle shifts in pronunciation to more noticeable changes in intonation and speech rhythm. For example, a person with ADHD might find themselves unconsciously adopting a Southern drawl when conversing with someone from Texas, even if they’ve never lived in the South themselves."
People are having their say online. On the subreddit r/ADHDWomen, a thread began: "Taking on accents is an ADHD thing?" The OP shares, "My whole life, I've picked up accents. I, myself, never noticed, but everyone around me would be like, 'Why are you talking like that??' It could be after I watched a show or movie with an accent or after I've traveled somewhere with a different accent than my 'normal.'
They continue, "Apparently, I pick it up fast, but it fades out slowly. Today... I'm scrolling Instagram, I watch a reel from a comedian couple (Darcy and Jeremy. IYKYK) about how Darcy (ADHD) picks up accents everywhere they go. It's called ADHD Mirroring??? And it's another way of masking."
(The OP is referring to Darcy Michaels and his husband Jeremy Baer, who are both touring comedians based in Canada.)
Hundreds of people on the Reddit thread alone seem to relate. One comments, "Omfg I've done this my whole life; I'll even pick up on the pauses/spaces when I'm talking to someone who is ESL—but English is my first language lol."
Sometimes, it can be a real issue for those around the chameleon. "I accidentally mimicked a waitress's weird laugh one time. As soon as she was out of earshot, my family started to reprimand me, but I was already like 'oh my god I don’t know why I did that, I feel so bad.'"
Many commenters on TikTok were shocked to find out this can be a sign of ADHD. One jokes, "Omg, yes, at a store the cashier was talking to me and she was French. She's like 'Oh are you French too? No, I'm not lol. I'm very east coast Canada."
And some people just embrace it and make it work for them. "I mirror their words or phrase! I’m 30. I realized I start calling everyone sweetie cause my manager does & I work at coffee shop."
This article originally appeared in May.