And what it cannot do yet.
A student's field guide to the science that is quietly extending human life. Eleven pieces on the heart, the brain, cancer, and the frontier beyond them, written for people with no medical background and cited to primary sources throughout.
Apply CRISPR, base editing, and prime editing to the same strand of DNA and watch exactly how the three differ.
Open the toolCholesterol is usually discussed as a number. Drag two sliders and watch it behave much more like an area.
Open the toolGive a colony of bacteria one course of antibiotics at a time, and watch a drug stop working.
Open the toolAtherosclerosis is damage that adds up over decades, which is exactly why it is one of the most preventable causes of death.
ReadA long life is only as good as the brain that lives it. The first drugs that touch the disease itself, not only the symptoms.
ReadCancer is the reason so many dreams of a longer life run into a wall, and where medicine has changed most in a decade.
ReadGLP-1 medicines began as diabetes treatments and became something much larger. The mechanism is more elegant than the headlines.
ReadAntibiotics are the only class of drug that becomes less effective the more we use it.
ReadIntensive care rarely cures anything. It keeps a person alive long enough for something else to work.
ReadTransplantation works. There are simply not enough organs, which is why so much effort goes into making more.
ReadGene editing, regenerative medicine, and the honest question of how far the boundary of death can move.
ReadPlainly Medicine explains what modern medicine can and cannot do, in language a reader with no medical background can follow. It exists because most writing about medicine fails in one of two directions. It promises breakthroughs that have not arrived, or it waves away real progress as hype. Both leave you less able to understand your own health.
The subject is deliberately narrow and the format is not. Eight articles cover the conditions that decide how long most people live: cardiovascular disease, neurodegeneration, cancer, metabolic disease, infection, critical illness, and organ failure. Three interactive tools cover the ideas that are far easier to understand by moving a slider than by reading a paragraph, such as why lowering cholesterol early matters more than lowering it late.
The editorial standard is simple. Every clinical claim is cited to a primary source, usually the trial itself rather than the press release about it. Each claim carries a label saying whether the treatment is approved, still in trials, or early research, so the state of the evidence is visible rather than implied. Technical terms stay in, because readers deserve the real vocabulary, and each one is defined the first time it appears.
Nothing here is medical advice, and none of it is written by a licensed clinician. If a page makes a difficult idea clearer without misleading you, it has done its job.
If something here is wrong, out of date, or unclear, please say so. Corrections are taken seriously and the page is updated with a new date.