Close-up of a young adult using a smartphone outdoors, highlighting modern technology and connectivity.

The “CrackBerry” nickname stuck for a reason — and the variable-reward psychology that hooked early-2000s executives on their BlackBerrys is the exact same machinery now running every push notification on every smartphone in your pocket

Twenty-five years ago, the only people sleeping with their email device on the nightstand were lawyers, bankers, and a handful of executives whose firms paid for a BlackBerry Enterprise Server licence. The nickname those users eventually coined for the device — CrackBerry — turned out to describe the next two decades of consumer technology with

Close-up of glowing jellyfish swimming gracefully in deep green ocean waters.

A species of jellyfish called Turritopsis dohrnii can revert its adult cells back to a juvenile polyp stage when injured or starving, effectively restarting its life cycle, and biologists have so far failed to identify any natural limit to how many times it can do this.

The tiny jellyfish Turritopsis dohrnii can reorganise its adult cells back into a juvenile polyp when stressed, restarting its life cycle indefinitely. Biologists have observed more than ten reversals in a single animal and have yet to find any limit.

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Explore the historic Roman bridge in lush Salamanca, Spain captured beautifully in daylight.

The Roman aqueduct at Segovia, built around the first century AD without mortar, still carried water into the 1970s, its 167 granite arches held together by nothing but the precise weight distribution of stones cut to fit each other within fractions of a millimeter.

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