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Samsung Galaxy Z Fold 7 review: Quantum leap

Samsung’s new flagship foldable is a huge improvement over last year’s model.  The first foldable phones hit the market six years ago, and they were rife with compromises and shortcomings. Many of those problems have persisted, but little by little, foldables have gotten better. With the release of the…

Peacock feathers can emit laser beams

The feathers can emit two frequencies of laser light from multiple regions across their colored eyespots. Peacock feathers are greatly admired for their bright iridescent colors, but it turns out they can also emit laser light when dyed multiple times, according to a paper published in the journal Scientific…

Making Roman concrete produces as much CO2 as modern concrete

Roman concrete produces as much, if not more, CO2 as modern concrete, fewer air pollutants. Builders in ancient Rome used a special kind of ancient concrete to construct their aqueducts, bridges, and buildings. But is Roman concrete more sustainable than the Portland cement used in today’s concrete? The answer…