What is the largest organ of the human body?
AnswerSkin
The skin is the body's largest organ, covering and protecting everything inside.
Health · Facts & stats
Medical facts & stats
7 fact-checked facts about medicine and the human body, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Who discovered penicillin in 1928?
AnswerAlexander Fleming
Alexander Fleming noticed mold killing bacteria on a culture plate in London in 1928.
Going deeper
Wilhelm Röntgen discovered which kind of radiation in 1895?
AnswerX-rays
Röntgen discovered X-rays in 1895 and won the first Nobel Prize in Physics in 1901.
Edward Jenner developed the first vaccine, in 1796, against which disease?
AnswerSmallpox
Jenner used material from cowpox to protect against smallpox, the origin of the word vaccine.
Florence Nightingale became famous for nursing soldiers during which war?
AnswerCrimean War
Nightingale led nurses at Scutari during the Crimean War in the 1850s and helped found modern nursing.
Expert level
Who discovered the ABO blood groups in 1901?
AnswerKarl Landsteiner
Karl Landsteiner identified the A, B and O blood groups in 1901, making safer transfusions possible.
In which year did the World Health Organization declare smallpox eradicated?
Answer1980
The WHO declared smallpox eradicated in 1980, the first human disease wiped out worldwide.
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