Browse
All Facts
11,491 facts. Click any fact to see its full page.
All 11,491
π History 1,991
π¬ Science 1,964
πΎ Animals 1,525
π Space 977
π§ Psychology 893
πΏ Nature 759
π» Technology 735
π Geography 599
π Culture 581
π« Human Body 572
π Ocean 373
π¬ Language 245
π Food 199
β¨ General 68
β¨ Dinosaur 10
Mirror neurons may explain why watching someone get injured causes a physical sensation of discomfort.
The anchoring bias causes people to rely too heavily on the first piece of information they encounter.
The Zeigarnik effect means humans remember incomplete tasks better than completed ones.
The bystander effect means people are less likely to help in an emergency when others are present.
Cognitive dissonance drives people to rationalize rather than update their beliefs.
The average person makes about 35,000 decisions per day, the vast majority unconsciously.
Humans are the only animals known to blush β Darwin called it the most peculiar human expression.
The Dunning-Kruger effect means people with limited knowledge overestimate competence; experts underestimate theirs.
Roald Amundsen also became the first to navigate the Northwest Passage and the first to the South Pole.
The Voyager probes carry golden records with sounds and images from Earth as a message to possible finders.
The first descent to the bottom of the Mariana Trench took nearly 5 hours in the bathyscaphe Trieste.
The first photograph ever taken required an 8-hour exposure time β made in 1826 by Joseph NicΓ©phore NiΓ©pce.
The Panama Canal, opened in 1914, required the excavation of 170 million cubic meters of earth.
Exploration of Antarctic interior was complete only in the 20th century β first crossed overland in 1958.
The first human to orbit Earth was Yuri Gagarin on April 12, 1961 β the first American was John Glenn in 1962.
The deepest solo breath-hold dive ever was 332 meters by Ahmed Gabr in 2014.
Space Shuttle Challenger's 1986 disaster killed all seven crew members and grounded the program for nearly 3 years.
The first powered airplane flight by the Wright Brothers occurred at Kitty Hawk, North Carolina, in 1903.
New Horizons flew past Pluto in 2015 and is now beyond the solar system.
Charles Darwin's voyage on the HMS Beagle lasted five years and led to the theory of evolution.
The Rosetta spacecraft became the first to orbit and land a probe on a comet in 2014.
The COBE satellite in 1992 detected temperature variations in the cosmic background radiation, confirming Big Bang models.
The underground caves of Lechuguilla in New Mexico contain unique rock formations found nowhere else on Earth.
NASA's Voyager 2 is the only spacecraft to fly past all four outer planets.
The Terra Nova expedition to the South Pole in 1912 ended in tragedy β all team members died on the return.
Francis Drake completed the second circumnavigation of the globe in 1580.
The asteroid belt was discovered piece by piece β Ceres was found first, in 1801.
Alexander the Great reached the Indus River β farther east than any Western army had gone.
The human genome was fully mapped in 2003 after 13 years of international scientific collaboration.
The first satellite image of Earth was taken in 1959, revealing cloud patterns from space for the first time.
The SETI project has been scanning the skies for alien signals since 1960.
Deep-sea exploration has revealed that bioluminescence is far more common in the ocean than previously thought.
The Mary Rose, a warship of Henry VIII, sank in 1545 and was raised in 1982 in one of history's great archaeology projects.
James Cook's three voyages mapped vast areas of the Pacific and led to European knowledge of Australia.
The Northwest Passage was first navigated by Roald Amundsen from 1903β1906.
The Titanic's wreck was located in 1985 by Robert Ballard's team, 3,800 meters below the North Atlantic.
Lewis and Clark were guided by Sacagawea, a Shoshone woman without whom the expedition might have failed.
Ibn Battuta, a 14th-century Moroccan scholar, traveled 75,000 miles across the known world.
The Hubble Deep Field image revealed thousands of galaxies in a patch of sky the size of a grain of sand.
The Columbian Exchange accelerated the transfer of plants, animals, people, and diseases worldwide.
The Wright Brothers' first powered flight lasted 12 seconds and covered only 120 feet.
Marco Polo's accounts of China were widely disbelieved β many considered them fiction.
Amelia Earhart was the first woman to fly solo across the Atlantic Ocean in 1932.
The Viking Leif Erikson established a settlement at L'Anse aux Meadows around 1000 AD.
Roald Amundsen beat Scott to the South Pole by 34 days by using sled dogs rather than ponies.
Zheng He led massive Chinese voyages to Africa and Southeast Asia decades before European exploration began.
The first person to summit Everest was Edmund Hillary and Tenzing Norgay on May 29, 1953.
Jacques Cousteau co-invented the Aqua-Lung in 1943, enabling scuba diving.
Polynesian navigators settled the Pacific islands using only stars, waves, and birds β 1,000 years before Europeans.
Christopher Columbus never realized he had reached the Americas β he died believing he'd found Asia.