Discover how credit card validation codes work and protect against fraud. Learn about their placement, security role, and examples to secure online transactions.

WhatsApp's mass adoption stems in part from how easy it is to find a new contact on the messaging platform: Add someone's phone number, and WhatsApp instantly shows whether they're on the service, and ...

A deceptively simple math problem has left the internet stumped, proving it may be far trickier than it appears at first glance. The mathematical brain teaser, posted Friday by X user @BholanathDutta, ...

In Morse code, a short duration flash or ‘dot’ denotes a letter ‘E’ and a long duration flash, or ‘dash’, means letter ‘T’. Until now, the ability to discriminate between ‘dot’ and ‘dash’ has been ...

In a first-of-its-kind study, scientists found that bumblebees can tell the difference between short and long light flashes, much like recognizing Morse code. The insects learned which signal led to a ...

Researchers at Queen Mary University of London have shown for the first time that an insect—the bumblebee Bombus terrestris—can decide where to forage for food based on different durations of visual ...

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When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. It continues with an explanation on obfuscation within the Java Edition: "For a long time, Java ...

Google has rolled out a new “flick keys” feature in Gboard, allowing users to enter symbols and numbers by swiping down on letter keys instead of long-pressing. For example, flicking Q–P inputs 1–0, ...

In 1876, Peter Guthrie Tait set out to measure what he called the “beknottedness” of knots. The Scottish mathematician, whose research laid the foundation for modern knot theory, was trying to find a ...

The original version of this story appeared in Quanta Magazine. Imagine that someone gives you a list of five numbers: 1, 6, 21, 107, and—wait for it—47,176,870. Can you guess what comes next? If ...