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E=mc² means energy and mass are interchangeable — the 'c²' factor explains why tiny amounts of mass release enormous energy.
The Copenhagen interpretation of quantum mechanics says particles don't have definite states until observed.
The many-worlds interpretation of quantum mechanics proposes that every quantum event splits reality into parallel universes.
The Planck length (1.6 × 10⁻³⁵ meters) may be the smallest meaningful unit of space.
General relativity predicts the existence of gravitational waves — confirmed in 2015.
Supersymmetry predicts a 'superpartner' particle for every known particle — none have been found at the LHC.
Dark matter doesn't interact with light — it's detected only through its gravitational effects on visible matter.
Neutrinos have almost no mass and interact so weakly that billions pass through your body every second.
The mass of a proton is 1,836 times the mass of an electron.
Virtual particles spontaneously pop in and out of existence in the vacuum — the Casimir effect proves this.
The Standard Model of particle physics describes 17 fundamental particles — but doesn't include gravity.
Quantum entanglement allows instant correlations between particles regardless of distance — but cannot transmit information.
The electron was the first subatomic particle discovered — by J.J. Thomson in 1897.
Loop quantum gravity is a competing theory to strings — it suggests space itself is quantized at the Planck scale.
String theory proposes that all fundamental particles are vibrating strings of energy in 10 or 11 dimensions.
The four fundamental forces are gravity, electromagnetism, and the strong and weak nuclear forces.
Antimatter is real and produced in particle accelerators — a gram would release energy equivalent to a nuclear bomb.
The weak nuclear force is responsible for radioactive decay — without it, the Sun couldn't shine.
Every atom in your body was forged inside a star — you are literally made of stardust.
The uncertainty principle is not about measurement disturbance — it's a fundamental feature of nature.
Quantum mechanics is the most precisely tested theory in science — predictions match experiments to 12 decimal places.
The Higgs field permeates all of space — particles acquire mass by interacting with it.
Time is not constant — it passes more slowly for fast-moving objects and in stronger gravity fields.
The speed of light is the ultimate speed limit — nothing with mass can reach it.
Radiation therapy for cancer was developed after the discovery of X-rays in 1895 and radioactivity in 1898.
Stem cell therapy was first approved for leukemia in the 1980s using bone marrow transplants.
The discovery of prions — misfolded proteins that cause disease — by Stanley Prusiner won the 1997 Nobel Prize.
Laparoscopic surgery — keyhole surgery — was first performed in 1910 but only became routine in the 1980s.
The first artificial heart was implanted in 1969 — it kept the patient alive for 64 hours until a donor heart was found.
Penicillin-resistant bacteria were identified within 3 years of penicillin's widespread introduction.
The human genome project took 13 years; today a genome can be sequenced in under a day for $600.
Vaccines produce 'herd immunity' — once enough people are immune, transmission chains break and even unvaccinated people are protected.
The concept of 'evidence-based medicine' — requiring clinical trials to prove treatments work — only became mainstream in the 1990s.
Medical imaging began with X-rays in 1895 — ultrasound followed in the 1950s, CT in the 1970s, and MRI in the 1980s.
The discovery of blood groups in 1901 by Karl Landsteiner made safe blood transfusions possible.
Aspirin's mechanism of action wasn't understood until 1971 — 74 years after it was first synthesized.
The first successful bone marrow transplant was in 1956 — it's now curative for many blood cancers.
Chemotherapy works by targeting rapidly dividing cells — including hair follicles and gut lining, explaining side effects.
The first cloned mammal, Dolly the sheep, was born in 1996 — she was cloned from a mammary gland cell.
Ignaz Semmelweis discovered handwashing prevented childbed fever in 1847 — and was rejected so vehemently by peers he suffered a breakdown.
Streptomycin, the first antibiotic to cure tuberculosis, was discovered in 1943 — TB had killed billions throughout history.
The first antiretroviral therapy for HIV reduced AIDS deaths by 60–80% within years of introduction in 1996.
The first test-tube baby, Louise Brown, was born in 1978 — IVF has since produced over 10 million babies.
The discovery of the structure of DNA in 1953 by Watson, Crick, Franklin, and Wilkins transformed biology.
The first chemotherapy drug was nitrogen mustard — derived from mustard gas used in WWI.
Insulin was isolated in 1921 — before that, type 1 diabetes was universally fatal.
The invention of the stethoscope in 1816 came from Laennec rolling up paper to listen to a patient — it worked better than pressing an ear to the chest.
The development of the polio vaccine by Jonas Salk in 1955 was one of the most celebrated medical achievements.
Ether was first used as surgical anesthesia in 1846 — before that, speed and alcohol were the only options.
The discovery of penicillin in 1928 accidentally changed medicine — Fleming noticed mold killing his bacterial cultures.