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The majority of the world’s rechargeable batteries are now made using lithium-ion. Most rely on a combination of different rare earth metals such as cobalt or nickel for their electrodes. But around the world, teams of researchers are looking for alternative – and more sustainable – materials to build the…

 Across Europe, far-right movements are gaining ground. From the Netherlands, to Germany and Italy, they’re winning seats in parliaments and sometimes joining ruling coalitions. By normalising nationalist rhetoric and challenging democratic institutions, these parties raise comparisons with former periods of fascism on the continent.

In October 2021, 136 countries agreed to establish new tax rules requiring large multinational companies to pay at least 15% in corporate tax. Nearly four years later, this ambitious agreement is finally being implemented around the world, but its success faces big challenges.

For decades, multinational corporations have used sophisticated strategies to shift profits away from where they do business. As a result, countries around the world lose an estimated US$500 billion annually in unpaid taxes, with developing nations hit particularly hard.

More than two thirds of guns recovered at Mexican crime scenes originate in the U.S. For decades, Mexico has struggled with staggering levels of gun violence fueled in large part by weapons trafficked across its northern border.

For much of the 21st century, one theory has dominated research efforts to cure Alzheimer’s disease: the amyloid hypothesis. Beta-amyloid is a protein that builds up in clumps, or plaques, in the brains of people with Alzheimer’s disease and is linked to their cognitive decline.

Three months after the Trump administration made drastic cuts to its aid agency, USAID, the effects are being felt across the world, particularly in Africa.

The Trump administration’s cuts to funding for American universities and research have left many scientists reeling and very worried. At the National Institutes of Health, which has an annual budget of US$47 billion to support medical research both in the U.S. and around the world, nearly 800 grants have been…

Editor’s note: The Conversation learned after publishing this podcast that one of the interviewees, Igor Sacramento, passed away in late April. He was interviewed on 27 March for this episode. We’re deeply saddened to learn of his death and send our deepest sympathies to his friends, family and colleagues.