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Un brûlage contrôlé et préventif élimine la végétation sèche près d’un village de l’est de l’Angola. Luisa Escobar Alvarado

Dans l’est de l’Angola, la guerre a bouleversé des siècles de gestion du feu

La guerre civile en Angola a profondément modifié l’usage du feu dans les communautés rurales. Une étude montre que les surfaces brûlées ont diminué pendant le conflit, avant de fortement augmenter avec le retour de la paix.
L’échographie du deuxième trimestre de grossesse, qui coïncide avec l’annonce du sexe, permet une humanisation du fœtus par les parents qui s’autorisent à se projeter. Hazal Ak/Shutterstock

Les échographies prénatales et l’annonce du sexe du bébé : entre projection sociale et humanisation du fœtus

L’annonce du sexe du fœtus aux parents puis aux proches, comme celle du prénom qui a été choisi, humanise d’emblée le bébé à naître, lui assigne un genre et l’inscrit dans l’histoire familiale.
Chez les plus de 50 ans exposés à un environnement de travail dégradé, le fait de retarder le départ à la retraite augmente le risque de dépression. Prathankarnpap/Shutterstock

Retraite repoussée, dépression avancée ? Ce que la qualité de l’emploi change pour la santé mentale des seniors

Une étude qui a mobilisé des données dans 14 pays européens montre que repousser l’âge de départ à la retraite peut nuire à la santé mentale de celles et ceux qui avancent en âge.
Depuis les années 2010, les économistes s’intéressent de plus en plus aux liens complexes entre changement climatique et risque de conflit. Vern.design.lab/Shutterstock

Comment le réchauffement climatique nourrit la violence

Le changement climatique peut nourrir, indirectement, les violences. En cause, des tensions sur l’agriculture et l’exploitation des ressources minières.
On Dec. 4, 1783, after six years fighting against the British as head of the Continental Army, George Washington said farewell to his officers and returned to civilian life. Engraving by T. Phillibrown from a painting by Alonzo Chappell

Where George Washington would disagree with Pete Hegseth about fitness for command and what makes a warrior

Washington’s ‘warrior ethos’ was grounded in decency, temperance and the capacity to act with courage without surrendering to rage. That ideal built an army – and in time, a republic.
Punishment by tar and feather of Thomas Ditson, who purchased a gun from a British soldier in Boston in March 1775. Interim Archives/Getty Images

Yes, this is who we are: America’s 250‑year history of political violence

The US has long fused politics and violence, often through firearms. To claim that such shootings betray ‘who we are’ is to forget that the US was founded on this form of political violence.
The committee assigned to draft the Declaration of Independence, from left: Thomas Jefferson, Roger Sherman, Benjamin Franklin, Robert R. Livingston and John Adams. Currier & Ives image, photo by MPI/Getty Images

Along with the ideals it expresses, the Declaration of Independence mourns for something people lost in 1776 − and now, too

For all the festivities around July 4, the nation’s founding document, the Declaration of Independence, actually depicts a wounded, fearful society, teetering on the brink of disaster. Sound familiar?
President Donald Trump addresses a joint session of Congress at the U.S. Capitol on March 4, 2025. Chip Somodevilla/Getty Images

Trump is the kinglike president many feared when arguing over the US Constitution in 1789 – and his address to Congress showed it

When the US Constitution was written, many people − from those who wrote the document to those on the outside who read it − believed that endowing the president with kinglike powers was dangerous.
A painting of President Andrew Jackson hangs in the Oval Office on the day Donald Trump was inaugurated for the second time, Jan. 20, 2025. AP Photo/Evan Vucci)

President Trump may think he is President Jackson reincarnated − but there are lessons in Old Hickory’s resistance to sycophants

President Donald Trump feels kinship with former President Andrew Jackson. But a presidential historian says that Jackson diverged in fundamental ways from the path Trump is taking.
(L-R) Bad Bunny, Stefflon Don, Drake and Justin Bieber are all named in the lawsuit. Tinseltown/Featureflash Photo Agency/Anton Mak/DFree/Shutterstock

The lawsuit that could bring reggaetón to its knees

The legal action means thousands of songs may be deemed in violation of copyright. This would establish a precedent for future copyright claims based on popular rhythms.
‘Our machines have now been running for 70. or 80. years,’ an old Thomas Jefferson, right, wrote to an even older John Adams, left. Photo12/Universal Images Group via Getty Images

80 is different in 2023 than in 1776 – but even back then, a grizzled Franklin led alongside a young Hamilton

Americans have long nurtured mixed feelings about age and aged leaders. Yet during the country’s founding, a young America admired venerable old sages.

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