Ancient
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This ancient civilization built the Great Pyramid of Giza, one of the Seven Wonders of the Ancient World.
What is Ancient Egypt?
This famous gemstone is a red variety of the mineral corundum and is the birthstone for July.
What is a ruby?
In 1776, this document famously declared that the American colonies were free from British rule.
What is the Declaration of Independence?
This part of the eye gives it its color and controls how much light enters the eye.
What is the iris?
This is the star at the center of our solar system.
What is the Sun?
In ancient Rome, this was the name given to the large arena where gladiators fought and public spectacles were held.
What is the Colosseum?
In traditional American symbolism, this red flower is often worn on Memorial Day to honor those who died in military service.
What is a poppy?
This U.S. president delivered the Gettysburg Address during the Civil War in 1863.
Who is Abraham Lincoln?
The light-sensitive layer at the back of the eye that contains rods and cones is called this.
What is the retina?
This famous star pattern, also known as the Big Dipper, is part of a larger constellation named for a great bear.
What is Ursa Major?
According to legend, this ancient city was destroyed by a volcanic eruption from Mount Vesuvius in 79 A.D.
What is Pompeii?
This deep-red pigment was historically made from a mineral called cinnabar and was used by ancient civilizations in artwork.
What is vermilion?
Completed in 1869, this railroad connected the eastern and western portions of the United States by rail.
What is the Transcontinental Railroad?
This transparent, curved structure at the very front of the eye helps focus incoming light.
What is the cornea?
This is the closest star to Earth after the Sun.
What is Proxima Centauri?
This ancient Greek philosopher was sentenced to death after being accused of corrupting the youth of Athens.
Who is Socrates?
This famous painting by Edvard Munch features a figure standing beneath a dramatic blood-red sky and is one of the most recognizable works of modern art.
What is The Scream?
This 1803 purchase from France nearly doubled the size of the United States.
What is the Louisiana Purchase?
These photoreceptor cells are especially important for seeing in dim light but do not detect color.
What are rods?
Also known as the North Star, this star has been used for centuries as a navigational reference in the Northern Hemisphere.
What is Polaris?
Written in cuneiform on clay tablets, this ancient Mesopotamian work is often considered one of the world’s oldest surviving literary epics.
What is the Epic of Gilgamesh?
This red-colored planet is named after the Roman god of war and has the largest volcano in our solar system, Olympus Mons.
What is Mars?
This 1961 event involved a failed attempt by Cuban exiles, supported by the United States, to overthrow Fidel Castro.
What is the Bay of Pigs invasion?
Located near the center of the retina, this tiny area provides the sharpest central vision needed for activities like reading.
What is the macula?
This massive explosion marks the dramatic death of certain stars and can temporarily become bright enough to outshine an entire galaxy.
What is a supernova?