Browse
All Facts
11,491 facts. Click any fact to see its full page.
All 11,491
š History 1,991
š¬ Science 1,964
š¾ Animals 1,525
š Space 977
š§ Psychology 893
šæ Nature 759
š» Technology 735
š Geography 599
š Culture 581
š« Human Body 572
š Ocean 373
š¬ Language 245
š Food 199
⨠General 68
⨠Dinosaur 10
The average life expectancy in ancient Rome was about 35 years ā largely due to high infant mortality, not short adult lives.
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 ā misfolded proteins that cause disease ā by Stanley Prusiner won the 1997 Nobel Prize.
Laparoscopic surgery ā keyhole surgery ā was first performed in 1910 but only became routine in the 1980s.
The first artificial heart was implanted in 1969 ā 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' ā once enough people are immune, transmission chains break and even unvaccinated people are protected.
The concept of 'evidence-based medicine' ā requiring clinical trials to prove treatments work ā only became mainstream in the 1990s.
The first successful heart transplant in 1967 was performed by Christiaan Barnard ā the patient lived 18 days.
Medical imaging began with X-rays in 1895 ā 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.
Before anesthesia, surgeons competed on speed ā the fastest amputations in history were performed in under 30 seconds.
The Black Death in 14th-century Europe was so catastrophic that it led to improved wages and changed social structures.
Aspirin's mechanism of action wasn't understood until 1971 ā 74 years after it was first synthesized.
The first successful bone marrow transplant was in 1956 ā it's now curative for many blood cancers.
Doctors in ancient Rome performed cataract surgery ā they used a needle to push the clouded lens out of the field of vision.
The World Health Organization was founded in 1948 ā polio eradication remains its greatest ongoing campaign.
The concept of placebo-controlled double-blind trials was established in the 1940s ā before that, most medical claims were anecdotal.
Chemotherapy works by targeting rapidly dividing cells ā including hair follicles and gut lining, explaining side effects.
The first cloned mammal, Dolly the sheep, was born in 1996 ā she was cloned from a mammary gland cell.
The Spanish flu of 1918 killed more people in a single year than WWI killed in four years.
Ignaz Semmelweis discovered handwashing prevented childbed fever in 1847 ā and was rejected so vehemently by peers he suffered a breakdown.
The first successful cochlear implant was performed in 1961 ā allowing profoundly deaf people to hear.
Malaria has killed more humans than any other disease in history ā estimated at half of all humans who ever lived.
The Flexner Report of 1910 standardized medical education in North America ā shutting down many substandard schools.
Streptomycin, the first antibiotic to cure tuberculosis, was discovered in 1943 ā TB had killed billions throughout history.
The first organ transplant was a kidney in 1954 ā liver and heart transplants followed in 1963 and 1967.
Surgical robots perform operations through tiny incisions ā reducing recovery time from weeks to days.
The first antiretroviral therapy for HIV reduced AIDS deaths by 60ā80% within years of introduction in 1996.
MRI technology was first used clinically in 1977 ā a full-body scan then took 5 hours.
The first test-tube baby, Louise Brown, was born in 1978 ā 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 ā derived from mustard gas used in WWI.
Insulin was isolated in 1921 ā before that, type 1 diabetes was universally fatal.
The first kidney transplant in 1954 was between identical twins to avoid rejection.
The invention of the stethoscope in 1816 came from Laennec rolling up paper to listen to a patient ā it worked better than pressing an ear to the chest.
Antiseptic surgery, introduced by Joseph Lister in 1867, dramatically reduced post-operative death rates.
The development of the polio vaccine by Jonas Salk in 1955 was one of the most celebrated medical achievements.
Smallpox was eradicated in 1980 ā the first and only human disease to be fully eradicated.
The thalidomide disaster of the 1950sā60s ā a drug for morning sickness causing birth defects ā led to modern drug testing standards.
Ether was first used as surgical anesthesia in 1846 ā before that, speed and alcohol were the only options.
The discovery of penicillin in 1928 accidentally changed medicine ā Fleming noticed mold killing his bacterial cultures.
The first successful blood transfusion between humans was in 1818 ā earlier attempts used animal blood and killed patients.
Florence Nightingale was a pioneer of statistical graphics ā she used 'polar area diagrams' to show hospital mortality.
Bloodletting was practiced for over 2,500 years ā it likely killed as many patients as it helped.
The germ theory of disease was established in the 1860s ā before that, 'miasma' (bad air) was blamed for illness.
Hippocrates, around 400 BC, first proposed that diseases had natural rather than supernatural causes.
The first close-up images of Pluto showed active nitrogen ice geysers and a surprisingly young surface.