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How do airplanes fly? An aerospace engineer explains the physics of flight

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com.

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German study finds democracies declining worldwide, autocracies rise

Democracies are in the minority in developing and emerging countries, according to an international analysis by Germany's Bertelsmann Foundation. The study, which is to be discussed with Chancellor Olaf Scholz in Berlin on Monday and fully published on Tuesday, found 63 democracies in the world with a total population of about 3 billion, compared to 74 autocratically ruled states with a combined population of around 4 billion. Bertelsmann's "Transformation Index 2024" with the title "Democracy is increasingly losing ground around the world" is the 10th such study over the past 20 years. The re...

Your tax dollars may be funding the expansion of the plastics industry

This story was originally published by Grist. You can subscribe to its weekly newsletter here.

With demand for fossil fuels expected to decline as the world shifts toward electric vehicles and renewable energy, Big Oil is in the midst of an enormous pivot to plastic production. And taxpayers are helping them.

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How genetic therapies transformed the lives of sickle cell patients

Their stories are divided into before and after.

First, those long years of pain which flooded every moment -- school, relationships, work.

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AZ legislature hosts new COVID hearing full of misinformation

For the third time in less than a year, Arizona Republican lawmakers listened intently and offered no pushback during a special hearing at the state Senate that was billed as examining the state’s response to the COVID-19 pandemic but was instead rife with conspiracy theories, misinformation and fear-mongering about vaccines and public health.

In May 2023, the Novel Coronavirus Southwestern Intergovernmental Committee featured testimony from a group of supposed health experts who spread misinformation about vaccines and the pandemic during the committee’s time. Then, in October 2023, the committee met again, bringing some of the same “experts.”

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Lava flows slow from latest Icelandic volcano eruption

The flow of lava following the latest volcanic eruption in Iceland has slowed down, officials said on Sunday. On Saturday evening, the volcano erupted for the fourth time in four months near the Icelandic port town of Grindavík on the Reykjanes Peninsula. The type of eruptions are known as fissure eruptions, in which there are normally no large explosions or significant spreading of ash. Nevertheless, the bright red-orange glow of the eruptions could also be seen from the capital Reykjavik, which lies around 55 kilometres north-east of Grindavík. Although the lava has slowed, Einar Hjörleifsso...

Darwin's Galapagos island species, protected yet still at risk

Industrial fishing boats hover menacingly on the edges of Ecuador's Galapagos Marine Reserve, where schools of multicolored fish and hammerhead sharks frolic in the protected Pacific waters.

The reserve is a haven for the flurry of creatures and plants living in the waters around the Galapagos Islands where naturalist Charles Darwin found the inspiration for his theory of natural selection.

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Mental health experts flag 'worrisome signs in the GOP candidate's cognitive presentation'

Psychiatrists and mental health experts are asking that a rule be made that any presidential candidate over the age of 75 have a "comprehensive neuropsychological evaluation" to ensure that he or she is fit to serve in office.

The working group, known as "Duty to Warn," collaborated in 2017 on a book that walked through the mental and cognitive health of then-President Donald Trump and the dangers he posed to the United States.

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Whale of a tail: Scientists track unique humpback 'fingerprint'

In Antarctica, a scientist waits patiently for two frolicking humpback whales to poke their tails out of the icy waters so she can take a photographic "fingerprint" of the unique colors and patterns that allow researchers to identify individuals of the species.

Andrea Bonilla, a Colombian scientist at Cornell University in the United States, has been working with a team of researchers since 2014 to catalog humpback whales from a visual analysis of their tails -- or flukes.

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U.S. approves first drug for severe form of fatty liver disease

The U.S. Food and Drug Administration (FDA) on Thursday approved the first medication for people with a severe type of non-alcoholic fatty liver disease.

Madrigal Pharmaceuticals' Rezdiffra was shown to improve liver scarring in a clinical trial involving hundreds of people with non-alcoholic steatohepatitis (NASH), the worst form of the condition caused by a buildup of fat in the liver.

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With bites rare, experts want sharks to shed scary reputation

As the northern hemisphere edges toward spring and millions flock to the beach, headlines have dubbed the southeastern US state of Florida the world's most likely place to be bitten by a shark.

They're right, but, at the same time, shark bites are exceedingly rare overall -- a fact scientists wish more people knew, especially amid declining shark populations desperately in need of conservation.

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Bitcoin not invented by computer scientist Wright: court

Australian computer scientist Craig Wright is not "Satoshi Nakamoto", the pseudonym used by the creator of the cryptocurrency bitcoin when it launched in 2008, a UK court ruled Thursday.

The decision follows a trial in London's High Court after the Crypto Open Patent Alliance (COPA), a nonprofit organization set up to keep cryptocurrency technology free from patents, sued Wright.

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