'In this paper a novel optical illusion is described in which purple structures (dots) are perceived as purple at the point of fixation, while the surrounding structures (dots) of the same purple colour are perceived toward a blue hue.'
Decades of research in environmental psychology and building science reveal that indoor conditions can profoundly affect human health and behavior. Lighting influences circadian rhythms and sleep patterns. Air quality impacts cognitive performance and respiratory health. Temperature and acoustics shape comfort and concentration.
The illusion is the latest masterpiece from Olivier Redon, a French-American inventor, who has had his creations used in museums and on TV programmes around the world. For today's puzzles, I present five of Redon's most brilliant images. The challenge is to figure out how he managed to create them.
At a time when memories are increasingly flattened into folders, feeds, and cloud backups, a new experimental device from MIT Media Lab proposes a far more intimate archive: scent. Developed by Cyrus Clarke, the Anemoia Device is a speculative yet functional prototype that translates photographs into bespoke fragrances using generative AI, inviting users not to view memories, but to inhabit them through the body.
You know that sinking feeling when you realize you've been using a phrase that makes you sound less intelligent than you actually are? I had one of those moments a few years back during a pitch meeting for my startup. I was presenting to potential investors, and I kept saying "I think" before every point I made. "I think our user acquisition strategy will work."
Real estate with ocean views, stunning mountain vistas, and wide-open green spaces sell at premium prices because humans find those settings pleasing [1-5]. Certain color combinations in fashion-such as brown and forest green-blend harmoniously, while others, such as hot pink and orange, clash. And our eyes like certain proportions in visual objects (like buildings and human faces) but not others.
Accomplishment Hallucination is a cognitive state in which speed feels like competence, output feels like accomplishment, and work feels done when the actual work-the thinking-through, the failure-mode analysis, the sitting with uncertainty until the problem reveals its structure-hasn't happened at all. Physics need not apply. AI can create a similar state in waking life—literally, as your very words assume form before your eyes like a conjuring sorcerer. But, like real life, the code may be buggier than we realize.
In 2011, researchers Jason Tangen, Sean Murphy, and Matthew Thompson at the University of Queensland discovered a striking visual illusion while preparing a set of face images for a study. As they were going quickly through the faces to check their spatial alignment, they started noticing that the faces appeared highly distorted, almost cartoonish. They then realized that these distortions were most pronounced when the faces were flashed about 4-5 times per second in peripheral vision.
When Sonos released its redesigned app in May 2024, the backlash was immediate and brutal. Users couldn't access basic features like volume control and alarms. Systems became unusable. The company's stock plummeted 25%. Eventually, the CEO was replaced, and lawsuits claimed over $5 million in damages from customers who'd lost functionality they'd paid for.
Take the sur­prise some have expressed in recent years upon find­ing out that the expres­sion to "pic­ture" some­thing in one's head isn't just a fig­ure of speech. You mean that peo­ple "pic­tur­ing an apple," say, haven't been just think­ing about an apple, but actu­al­ly see­ing one in their heads? The inabil­i­ty to do that has a name: aphan­ta­sia, from the Greek word phan­ta­sia, "image," and prefix - a, "with­out."
Yes and no, says cognitive scientist Tomer Ullman, the Morris Kahn Associate Professor of Psychology, who with Halely Balaban recently published a paper titled "The Capacity Limits of Moving Objects in the Imagination." If you're like most people, you probably thought about some of these things, but not others. People build mental imagery hierarchically, starting with the ideas of "person," "room," "ball," and "table," then placing them in relation to one another in space, and only later filling in details like color.
AI is disrupting more than the software industry, and is doing so at a breakneck speed. Not long ago, designers were deep in Figma variables and pixel-perfect mockups. Now, tools like v0, Lovable, and Cursor are enabling instant, vibe-based prototyping that makes old methods feel almost quaint. What's coming into sharper focus isn't fidelity, it's foresight. Part of the work of Product Design today is conceptual: sensing trends, building future-proof systems, and thinking years ahead.
The question dropped into the Slack channel before the user research summary. Before the problem was clearly defined. Before anyone asked if users actually needed this feature. Your product manager already generated three interface options in ChatGPT. Now they're asking which one to build. Not whether to build. Not why to build. Which. And when you slow the conversation down to ask those questions, you're about to discover that strategic thinking now reads as bottleneck behavior.
