The Continental Congress adopted the Declaration on July 4, 1776, but the familiar parchment collected signatures later. The National Archives says the common image of all delegates signing together on July 4 is a misconception; most signed on August 2 and some signed later. Adoption, printing and signing were separate steps in the document's history.

Mount Vernon's research describes Washington's dentures as combinations of materials that included human and animal teeth, ivory and metal, depending on the set. None was made of wood. Staining may have helped the wooden-teeth story persist. The fuller history also requires acknowledging that teeth obtained from enslaved people appear in Washington's financial records.

The story that young George Washington cut a cherry tree and confessed because he could not lie entered print through biographer Mason Locke Weems after Washington's death. Mount Vernon finds no evidence that the episode happened. It works as a moral fable about honesty, but repeating it as documented childhood history mistakes a teaching story for a contemporary record.

In the 1692 Salem witch trials, nineteen people were hanged and Giles Corey died after being pressed; others died in jail. The National Park Service explains that burning was not the execution method used in these New England proceedings. Correcting that point does not reduce the injustice—it restores the specific legal violence the victims experienced.

The famous warning involved a network of riders and local alarm systems, including William Dawes and Samuel Prescott. The National Park Service also notes that secrecy mattered because British troops were nearby; loudly announcing a modern national label would have made little sense in 1775. Revere's real contribution is more interesting when restored to the network around it.

The National Museum of Denmark describes Viking helmets as practical protection and says the familiar horned image is not supported by Viking Age helmet evidence. Horns became powerful visual shorthand through later art and costume. Ceremonial horned objects from other periods or contexts do not establish that warriors fought in the opera-inspired silhouette.

The National Army Museum explains that Napoleon's recorded height was around average for a French man of his era. Confusion between French and British measurements, hostile caricature and the nickname Little Corporal all helped shrink him in popular memory. The correction concerns stature; it does not ask readers to admire his wars or political rule.

Population booms can drive lemmings to disperse, and some die while crossing water or difficult terrain. That is not an organized suicidal impulse. Alaska wildlife educators trace much of the modern myth to staged or misleading screen imagery. Real population cycles, predation and migration are enough to explain dramatic changes without assigning human intent to rodents.

Ostriches lower their heads to tend eggs in shallow ground nests, feed or flatten themselves when threatened, which can create the illusion of a missing head from far away. They do not believe a buried head makes the whole body invisible. The myth converts an angle of observation into a claim about the animal's judgment.

Cattle are not responding to red the way the myth suggests. In a bullfighting demonstration, movement and provocation drive the charge more than cape color. The correction is not an endorsement of bullfighting, which raises animal-welfare concerns. It simply separates bovine color vision from a cultural symbol that humans find visually dramatic.

Bat species use vision as well as other senses, and many insect-eating bats add echolocation for navigation and hunting in darkness. Fruit bats may rely strongly on sight and smell. Saying blind as a bat erases this diversity. Echolocation is an additional sensory system, not compensation for an entire mammal order lacking functional eyes.

NOAA notes that lightning can and does hit the same location more than once, especially tall or isolated structures. A previous strike does not create immunity. The safety lesson is immediate: if thunder is audible, move to a substantial building or hard-topped vehicle and remain sheltered after the storm rather than relying on folklore about a protected spot.

Earth's axial tilt changes the Sun's angle and day length across hemispheres during the year. NASA points out that Northern Hemisphere summer occurs when Earth is near the farther part of its orbit, not the closest. The opposite seasons north and south are another clue that one global Earth-Sun distance cannot explain seasonal temperature patterns.

The Moon rotates once per orbit, so the same hemisphere generally faces Earth. Both near and far sides still move through sunlight and night over a lunar cycle. NASA therefore calls dark side misleading when it means the unseen hemisphere. During a new moon from Earth, much of the far side is actually illuminated.

NASA says the Great Wall cannot be seen from the Moon with the unaided eye and is difficult to distinguish even from low Earth orbit without favorable conditions or magnification. The myth predates human spaceflight. Its narrow shape and earth-toned materials matter more than total length when visibility is judged from hundreds or thousands of kilometers away.