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Teenagers understand social media algorithms but want more control, study finds

Teenagers want a greater voice in the design and governance of platforms such as TikTok, Instagram and YouTube, according to new research led by University College Dublin. Rather than passive victims of social media algorithms, the study found adolescents have a sophisticated und

Admin Recifes 15/07/2026 1

Saturn-ring-like laser emission from chiral polymeric microspheres

Controlling light within microscopic spaces is crucial for next-generation optical devices such as photonic integrated circuits and localized sensors. Microspheres formed of luminescent π-conjugated polymers act as optical resonators that confine and amplify light via whispering

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Black women academics in my study said their main allies were white men: What this reveals

Universities have a role in challenging the status quo on issues such as gender, race, nationality and sexuality. But all too often, they replicate societal inequalities.

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Social media influencers who match racial, ethnic identity of their audiences have a bigge

Food marketers increasingly use people for paid promotions who share the racial and ethnic identities of their target audiences because such "identity congruence" is seen as persuasive. This strategy has migrated to social media, where it can reach millions of users daily, includ

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JWST's 'overmassive' early black holes may not be so massive after all

Astronomers studying a population of unusually X-ray-silent and overmassive black holes discovered by the James Webb Space Telescope have found that they may not be as massive as they appear. The new paper, outlining a plausible scenario that would produce such black holes, was p

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More than 90% of key nutrients degrading the Mar Menor lagoon come from recirculated under

More than 90% of the key nutrients degrading the Mar Menor, such as ammonium, phosphorus and silica, do not come from streams or continental groundwater, but rather through a mechanism that has so far been overlooked: Water from the lagoon itself infiltrates the sediments and re-

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Heat-shrinking materials get cleaner production route with lower temperatures and finer pa

Among the many modern technologies that shape life today, functional oxide materials are found in almost everything, from advanced electronics to energy-efficient systems. Functional oxides with high-valent metal ions are a significant topic of interest because of their unusual p

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Nine out of 10 Brazilian cities have experienced climate-related disasters over the past t

Extreme weather events are becoming increasingly frequent and severe. The El Niño predicted for 2026–2027 is one such event. These events have caused environmental, economic and social impacts in Brazil, requiring specific public policies. To transform scientific data into a foun

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Is male testosterone in freefall? – podcast

Men’s average testosterone levels have halved over the past 50 years, according to scientists who say society is facing a male fertility crisis. Rising levels of obesity and diabetes are expected to play a part, but the team behind the work suggest that environmental factors such

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These ancient quasars shouldn't exist so soon after the Big Bang

Astronomers have uncovered 31 of the oldest known quasars, including the two earliest ever detected, shining from a time when the universe was only about 670 million years old. Powered by supermassive black holes billions of times the Sun’s mass, these incredibly bright objects c

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A new route to electrically controlled helimagnetic structures

Advanced magnetic memory and spintronic devices rely on the ability to control magnetic states using electricity. Today, such technologies work by manipulating relatively simple magnetic structures found in ferromagnets, where all the magnetic moments point the same way. However,

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'Check your ingredients': A new blueprint for using Fermi's 'Golden Rule'

Underpinning much of modern technology, from smartphones to scanning tunneling microscopes to particle colliders, is Fermi's Golden Rule. Named for 20th-century Italian American physicist Enrico Fermi (but actually discovered by British physicist Paul Dirac), the rule is a formul

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