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ScienceIn 1869, Dmitri Mendeleev arranged the known elements into a table and left gaps for what had not yet been discovered, but the detail that makes the periodic table remarkable is that chemistry became organized enough to predict missing pieces of reality In March 1869, Dmitri Mendeleev presented to the Russian Chemical Society a way of laying out around sixty elements then known. By Space Daily Editorial Team · Jun 16, 2026

PsychologyThe Stoic philosopher Seneca observed that what makes a person genuinely happy is not how much they have, but how little they need to be content — and the small jolt of his observation, two thousand years later, is that most modern definitions of the good life are still organized around acquiring more of exactly the things he warned would never quite settle the longing they were meant to satisfy If you had to summarise Seneca's most uncomfortable observation in a single sentence, it would be this: most of what you are spending your life trying to acquire is not actually going to satisfy you when you get it. By Space Daily Editorial Team · Jun 16, 2026

Human BehaviourA Mediterranean diet rich in vegetables, fish, and olive oil reduces dementia risk even in people carrying two copies of the APOE4 gene variant — which raises Alzheimer's risk 12-fold — according to a 2025 Harvard study in Nature Medicine, in the first finding that a daily food pattern can partially overcome a genetic predisposition long thought to be inescapable For people who carry two copies of the APOE4 gene, the message from clinical medicine over the past three decades has been blunt: your risk… By Space Daily Editorial Team · Jun 16, 2026

PsychologyThe marshmallow test, redone with ten times as many children, found that a four-year-old's willpower mostly stopped predicting teenage success once family background was taken into account The marshmallow test is one of the most repeated stories in popular psychology. A small child is left alone with a treat and told that waiting will earn a second one. By Space Daily Editorial Team · Jun 16, 2026

ScienceThe hundreds of skeletons in a frozen Himalayan lake were blamed on one ancient disaster, until DNA showed some of the dead came from the eastern Mediterranean and died about a thousand years apart Roopkund Lake sits more than 5,000 metres up in the Indian Himalayas, a shallow body of meltwater that stays frozen for much of the year. By Space Daily Editorial Team · Jun 15, 2026