Last August Hinnerk Schulz-Hildebrandt noticed something strange while he was looking at a flight map on his phone. As his eye traced the plane’s flight path, he noticed that the line looked purple, ...

How many purple dots do you see in the image above? Are they all the same hue? This new optical illusion, developed by biomedical optics engineer Hinnerk Schulz-Hildebrandt, is more revealing than you ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Did the perfume "macerate"? Did it expire? Ahead, perfumers explain what’s going on.

The US FDA is currently reviewing its pharmaceutical manufacturing Guidance, after receiving feedback from industry trade groups. What will the new Guidance mean for pharma companies, as well as ...

Leeron is a New York-based writer who specializes in covering technology for small and mid-sized businesses. Her work has been featured in publications including Bankrate, Quartz, the Village Voice, ...

I encounter on this quest three types of Americans, because only three types exist. The type that you are—or the type that ...

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Pete Rathburn is a copy editor and fact-checker with expertise in economics and personal finance and over twenty years of experience in the classroom. Investopedia / Paige McLaughlin Communism stands ...