Science and Technology

Strong evidence supports exercise as a clinically meaningful intervention for depressive symptoms across ages and settings. The benefit is not uniform for every person or every protocol, so understanding the dose — frequency, intensity, time, type — and how to individualize it is essential for achieving reliable mood improvement.What the evidence showsMultiple randomized trials and meta-analyses indicate that exercise delivers a modest yet meaningful antidepressant effect, with pooled standardized mean differences typically ranging from about -0.3 to -0.6, reflecting symptom relief that many individuals find clinically significant.Benefits appear across both aerobic and resistance training approaches, as well as in supervised…

New images of the interstellar comet 3I/ATLAS nearing Earth have been captured by astronomersFresh observations of comet 3I/ATLAS reveal its unusual structure and dynamic tails as it nears its closest approach to Earth later this month. The interstellar visitor, which originated beyond our solar system, has sparked intense interest among scientists since its discovery in July 2025.Comet 3I/ATLAS is only the third interstellar object ever detected traveling through our solar system, making every observation crucial for understanding its trajectory, composition, and behavior. Both the Hubble Space Telescope and the European Space Agency’s Jupiter Icy Moons Explorer (Juice) mission have captured…

Volcanic eruption may have triggered the Black Death, study suggestsNew research proposes that a massive volcanic eruption in the mid-14th century may have set off a chain of events leading to the Black Death, one of the deadliest pandemics in human history. By combining climate data from tree rings, ice cores, and historical records, scientists are shedding new light on how environmental and societal factors intersected to create a perfect storm for the plague.Researchers have long studied the Black Death, which ravaged Europe between 1347 and 1351, claiming the lives of at least 25 million people—roughly half of the continent’s…

NASA could be on the verge of a significant overhaul as billionaire Jared Isaacman, President Donald Trump's contentious choice for administrator, presents an ambitious blueprint for the organization.Project Athena: an ambitious roadmapIsaacman, who has been nominated and then withdrawn before being renominated to lead NASA, has shared a 62-page document titled Project Athena that sketches his priorities for the agency. While some sections are now considered outdated, the plan signals sweeping changes, from internal reorganization to ambitious deep-space exploration goals. Isaacman has emphasized that the document was intended as a starting point, meant to evolve as he gathers data post-confirmation.Among…