https://chemistry.stemlores.com/2026-10-07 https://chemistry.stemlores.com/stories/who-discovered-oxygen-scheele-priestley-lavoisier/2026-10-07https://i.ytimg.com/vi/nyXDgNiopvo/hq720.jpgThree People Discovered Oxygen. Only One Got the Credit.Who discovered oxygen? Scheele made it first, Priestley published first, Lavoisier understood it. How the gas overturned phlogiston, and what discovery means.https://www.youtube.com/embed/nyXDgNiopvo5962026-10-07T14:00:36+00:00 https://chemistry.stemlores.com/stories/hydrogen-first-element-stars-hindenburg/2026-10-06https://i.ytimg.com/vi/wWwoD3SI-A8/hq720.jpgHydrogen: The First Element, the Fuel of Every Star (and the Hindenburg)Why is hydrogen element 1? How Cavendish found it, why it is three quarters of normal matter, how the Sun burns it and why the Hindenburg flew on it.https://www.youtube.com/embed/wWwoD3SI-A85922026-10-06T14:00:14+00:00 https://chemistry.stemlores.com/stories/why-is-gold-gold/2026-10-05https://i.ytimg.com/vi/qMNVpgVM5Yo/hq720.jpgWhy Is Gold Gold? (Einstein Is Partly to Blame)Why is gold yellow when almost every metal is silver? How relativity reshapes gold’s 6s orbital, why gold never tarnishes and why mercury is a liquid metal.https://www.youtube.com/embed/qMNVpgVM5Yo5762026-10-05T06:37:18+00:00 https://chemistry.stemlores.com/stories/petrichor-the-smell-of-rain/2026-10-05https://i.ytimg.com/vi/PAYalmjJZzU/oar2.jpgThe Smell of Rain Has a NamePetrichor is the smell of rain on dry ground, named in 1964. Part of it is geosmin from soil bacteria, flung into the air by tiny bubbles when raindrops land.https://www.youtube.com/embed/PAYalmjJZzU2026-10-04T16:00:02+00:00 https://chemistry.stemlores.com/stories/all-the-gold-ever-mined-in-one-cube/2026-10-05https://i.ytimg.com/vi/ZVvU6cYBS1k/oar2.jpgAll the Gold Ever Mined Fits in This CubeHow much gold has ever been mined? About 216,000 tonnes. At 19.3 g/cm³ it fills a cube about 22 metres on each side. Here is the arithmetic, step by step.https://www.youtube.com/embed/ZVvU6cYBS1k2026-10-03T16:00:03+00:00