alt = A statue of young Lincoln sitting on a stump, holding a book open on his lap

alt = Head shot of older, clean shaven Lincoln

alt = A dark-haired, bearded, middle-aged man holding documents is seated among seven other men.

alt = Photo of surf breaking on rocky shore

alt = Map displaying a looping line with arrows indicating that water flows eastward in the far Southern ocean, angling north east of Australia, turning sough after passing Alaska, then crossing the mid-Pacific to flow north of Australia, continuing west below Africa, then turning northwest until reaching eastern Canada, then angling east to southern Europe, then finally turning south just below Greenland and flowing down the Americas ' eastern coast, and resuming its flow eastward to complete the circle

alt = Map showing 5 circles.

alt = Map of Caribbean showing seven approximately parallel westward-pointing arrows that extend from east of the Virgin Islands to Cuba.

alt = Animation showing the continents separating from a single mass, making creating the Atlantic in the process

alt = Animation of audio, AM and FM sine waves

alt = Apollo program insignia

alt = Astronaut Buzz Aldrin stands on the Moon

alt = President John F. Kennedy addresses a joint session of Congress, with Vice President Lyndon B. Johnson and House Speaker Sam Rayburn seated behind him

alt = Black-and-white photograph of a statue consisting of an inscribed, round pedestal on top of which sits a seated, nude, male figure of which only the legs and lower torso are preserved

alt = Tapestry image of a man on horseback holding a falcon

alt = Tapestry image of a procession of men carrying a coffin heading towards a church building.

alt = Coin image of a crowned male head with a sceptre in the background

Image: AcropolisatathensSitePlan. png | right | 600px | alt = Site plan of the Acropolis at Athens

alt = Diagram showing video signal amplitude against time.

alt = This article incorporates public domain material Bulgaria country profile ( October 2006 ) from websites or documents of the Library of Congress Federal Research Division.

alt = Black-and-white picture of heavy machinery with two operators sitting aside

alt = Graphs showing similar elution curves ( metal amount vs drops ) for ( top vs bottom ) terbium vs berkelium, gadolinium vs curium, europium vs americium

alt = Sequential layers of spheres arranged from top to bottom: GRGBGRGB ( G = green, R = red, B = blue )

alt = Four ships flying the British flag advance in the foreground towards an anchored battle line in which the only clear detail is a huge burning ship.

alt = Four symbols representing the four members of Led Zeppelin in a horizontal row

alt = Children standing under a sign reading, " Welcome to Four Corners U. S. A ."

alt = Four men in military uniform, wearing buttoned jackets, wide-rimmed hats, black shoes, and carrying briefcases.

alt = Four wagons driven by teams of four horses race down a dirt track.

alt = Four Black Herons standing in low water with vegetation holding their wings over their bodies forming what looks like umbrellas

alt = Four screenshots of the same area of the game in different seasons.

alt = Four men in uniforms it a table reading books and documents.

alt = Four men sit facing each other around a table.

alt = Four men pose awkwardly for a photograph.

alt = Four men wearing coats and waving while surrounded by many other people.

alt = Four males standing at microphones with three playing guitars, second male from left at keyboards, all are inside an industrial shed with skylights behind.

alt = Four women wearing saree in different dancing poses

alt = Four members of a barbershop quartet standing around

alt = Four trophies on display behind a glassed wall

alt = Four people sit together on a shaded lawn beside a riverside path.

alt = Four skaters speed to the left over an ice rink closely and in single file.

alt = Four carriage train, on single curved track, at station.

alt = Four thin horses and a foal in a pen fenced with pipe panels, some eating hay