How does math guide our ships at sea?  George Christoph

110,393
Views 
2,708
Questions Answered
Let’s Begin…
Without math, would our seafaring ancestors ever have seen the world? Great mathematical thinkers and their revolutionary discoveries have an incredible story. Explore the beginnings of logarithms through the history of navigation, adventure and new worlds.
About TEDEd Originals
TEDEd Original lessons feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TEDEd original? Nominate yourself here »
Meet The Creators
David Hobizal
Animator
Eddy Hobizal
Artist
George Christoph
Educator
Sissy Emmons Hobizal
Artist
Share
John Napier was a famous Scottish theologian and mathematician who lived between 1550 and 1617. He spent his entire life seeking knowledge, and working to devise better ways of doing everything from growing crops to performing mathematical calculations. He is best known as the discoverer of logarithms. He was also the inventor of the socalled "Napier's bones". Napier also made common the use of the decimal point in arithmetic and mathematics. http://www.johnnapier.com/
Napier's bones (or Napier's rods) and logarithms: http://www.youtube.com/watch?v=ShjoKnSm9ds
Logarithms were introduced by John Napier in the early 17th century as a means to simplify calculations. They were rapidly adopted by navigators, scientists, engineers, and others to perform computations more easily, using slide rules and logarithm tables. http://en.wikipedia.org/wiki/Logarithm
A clock is an instrument used to indicate, keep, and coordinate time. The word clock is derived ultimately from the Celtic words clagan and clocca meaning "bell". A silent instrument missing such a mechanism has traditionally been known as a timepiece. http://en.wikipedia.org/wiki/Clock
A sextant is an instrument used to measure the angle between any two visible objects. Its primary use is to determine the angle between a celestial object and the horizon which is known as the object's altitude. Making this measurement is known as sighting the object, shooting the object, or taking a sight and it is an essential part of celestial navigation. http://www.mat.uc.pt/~helios/Mestre/Novemb00/H61iflan.htm
Create and share a new lesson based on this one.
About TEDEd Originals
TEDEd Original lessons feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TEDEd original? Nominate yourself here »
Meet The Creators
David Hobizal
Animator
Eddy Hobizal
Artist
George Christoph
Educator
Sissy Emmons Hobizal
Artist