First, the good news. Time travel isn’t necessarily forbidden by the laws of physics. In fact, the mathematics underpinning Albert Einstein’s theories of relativity offer up possibilities via the likes of wormholes and curved spacetime that might allow someone — or more likely something — to make a journey back…

Lecanemab, marketed as Leqembi, is a monoclonal antibody treatment for Alzheimer’s disease that targets and removes harmful amyloid plaques while slowing cognitive decline. Scientists from VIB and KU Leuven have now uncovered exactly how it works. Their research shows that a specific part of the antibody, known as the ‘Fc…

The ultra-rich are growing increasingly anxious about protecting their fortunes as war in the Middle East fuels fears of wider instability, with expats fleeing Dubai and turning to Switzerland to shield their wealth and dodge tax bills. Wealth managers say the more money clients have, the more urgently they are…

Gun traffickers have quietly moved what they say is an unprecedented number of weapons from the United States to Mexico. Our reporter Paulina Villegas followed the trail of these guns. By Paulina Villegas, Rebecca Suner, Jon Miller, Gabriel Blanco, Joey Sendaydiego, Stephanie Swart, Paul Ratje for The New York Times…