Animals in History & Media
Disney's Mickey Mouse made his synchronized sound debut in this 1928 animated short.
Steamboat Willie
Mathematical constant representing the ratio of a circle's circumference to its diameter, approx. 3.14.
Pi (\pi)
Hardest naturally occurring mineral on Earth, consisting of pure carbon.
diamond
A period of ten consecutive years is known as this.
decade
The three primary colors in traditional painter's subtractive color mixing.
Red, Yellow, and Blue
Soviet space dog who became one of the first animals in space aboard Sputnik 2 in 1957
Laika
Number system using only two digits, 0 and 1, foundational to computing.
binary system
Precious red gemstone mineral variety of corundum.
ruby
Number of days in a standard leap year.
366
Color produced by mixing red and blue together.
purple (or violet)
Domestic sheep that became the first mammal cloned from an adult somatic cell in 1996.
Dolly the Sheep
Roman numeral representing the number 50.
L
The Mohs scale measures this property of minerals on a 1 to 10 scale.
hardness
Greenwich Mean Time is aligned along this prime geographic line of longitude.
Prime Meridian
The primary additive colors of light used in digital screens, forming the acronym RGB.
Red, Green, and Blue
Famous racehorse who won the U.S. Triple Crown in 1973 setting records that still stand today.
Secretariat
Mathematical term for a whole number greater than 1 that has no positive divisors other than 1 and itself.
prime number
Green gemstone prized in ancient China and Mesoamerica, composed of jadeite or nephrite.
jade
A 100th anniversary celebration or milestone event is called this.
centennial
Color model used in commercial printing involving Cyan, Magenta, Yellow, and Key (Black).
CMYK
Famous chimpanzee studied by primatologist Jane Goodall in Gombe Stream National Park, Tanzania.
David Greybeard
Famous numerical sequence where each number is the sum of the two preceding ones: 0, 1, 1, 2, 3, 5, 8...
Fibonacci sequence
Organic gemstone formed inside the shells of living mollusks around an irritant.
pearl
System adjusting clocks forward one hour in spring to extend evening daylight.
Daylight Saving Time
Phenomenon where an object appears to be a different color depending on the light source.
metamerism