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The ancient Egyptians invented glass-making around 1500 BC ā initially as a luxury item.
Ancient Egypt's economy was based on grain ā it was the breadbasket of the ancient Mediterranean world.
The workers who built the pyramids were paid laborers ā not slaves ā according to archaeological evidence.
Ancient Egyptians used moldy bread as an antibiotic dressing ā a primitive understanding of penicillin.
Cleopatra VII was not Egyptian ā she was Macedonian Greek, the last ruler of the Ptolemaic dynasty.
The ancient Egyptians invented the 24-hour day ā dividing daytime and nighttime into 12 hours each.
Egyptian women had equal legal rights to men ā they could own property, initiate divorce, and conduct business.
The Book of the Dead contained over 200 spells to help the deceased navigate the afterlife.
Ancient Egyptians practiced medicine that included surgery, dentistry, and psychiatric observation.
The Step Pyramid of Djoser (2650 BC) is the world's oldest large-scale stone structure.
Egyptian hieroglyphics uses over 700 signs ā it was used for 3,500 years before being deciphered in 1822.
Ancient Egyptians had a god of chaos and storms (Set) and a god of order and sky (Horus) ā their balance was essential.
Pharaoh Ramesses II ruled for 66 years ā he fathered over 100 children and outlived 12 of his heirs.
The ancient Egyptian calendar had 365 days ā divided into 12 months of 30 days plus 5 festival days.
Ancient Egyptians mummified not just humans but also cats, ibises, crocodiles, and baboons as religious offerings.
The most tornadoes in a single day occurred on April 27, 2011 ā 218 twisters struck the southeastern US.
The 1931 China floods killed between 1 and 4 million people ā the deadliest natural disaster in recorded history.
The deadliest drought in history ā China's 1876ā79 famine ā killed an estimated 9ā13 million people.
The Great Blizzard of 1888 buried New York City under 130 cm of snow and killed 400 people.
The 2004 Indian Ocean tsunami, triggered by a magnitude 9.1 earthquake, killed over 230,000 people.
The Bhola cyclone of 1970 killed between 300,000 and 500,000 people ā the deadliest tropical cyclone ever.
The deadliest hailstorm in history killed 246 people in Bangladesh in 1988.
The Tigris and Euphrates rivers gave rise to Mesopotamian civilization ā 'the cradle of civilization.'
The Thames River in London was so polluted in 1858 that Parliament had to adjourn due to 'The Great Stink.'
Ancient Egypt's cat mummies number in the millions ā they were mass-produced as religious offerings.
The inventor of the telephone, Alexander Graham Bell, considered his invention an intrusion ā he refused to have one in his study.
Lobsters were once considered peasant food ā used as fertilizer and fed to prisoners in colonial America.
The Great Wall of China cannot be seen from space with the naked eye ā this is a persistent myth.
The shortest war in history lasted 38ā45 minutes between Britain and Zanzibar in 1896.
Cleopatra lived closer in time to the Moon landing than to the construction of the Great Pyramid.
The Great Wall of China contains human remains ā workers who died were sometimes buried within the wall.
The WHO's campaign to eradicate Guinea worm disease has reduced cases from 3.5 million in 1986 to under 15 today.
The average life expectancy in ancient Rome was about 35 years ā largely due to high infant mortality, not short adult lives.
The first successful heart transplant in 1967 was performed by Christiaan Barnard ā the patient lived 18 days.
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.
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.
The Spanish flu of 1918 killed more people in a single year than WWI killed in four years.
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.
The first organ transplant was a kidney in 1954 ā liver and heart transplants followed in 1963 and 1967.
The first kidney transplant in 1954 was between identical twins to avoid rejection.
Antiseptic surgery, introduced by Joseph Lister in 1867, dramatically reduced post-operative death rates.
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.
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.