Leonhard Euler ( ; ; ; 15 April 170718 September 1783) was a Swiss mathematician, physicist, astronomer, logician and engineer who made important and influential discoveries in many branches of mathematics like infinitesimal calculus and graph theory while also making pioneering contributions to several branches such as topology and analytic number theory. He also introduced much of the modern mathematical terminology and notation, particularly for mathematical analysis, such as the notion of a mathematical function. He is also known for his work in mechanics, fluid dynamics, optics, astronomy, and music theory. 

Euler was one of the most eminent mathematicians of the 18th century, and is held to be one of the greatest in history. He is also widely considered to be the most prolific mathematician of all time. His collected works fill 60 to 80 quarto volumes, more than anybody in the field. He spent most of his adult life in Saint Petersburg, Russia, and in Berlin, then the capital of Prussia. 

A statement attributed to Pierre-Simon Laplace expresses Euler's influence on mathematics: "Read Euler, read Euler, he is the master of us all." 

Leonhard Euler was born on 15 April 1707, in Basel, Switzerland to Paul III Euler, a pastor of the Reformed Church, and Marguerite Brucker, a pastor's daughter. He had two younger sisters: Anna Maria and Maria Magdalena, and a younger brother Johann Heinrich. Soon after the birth of Leonhard, the Eulers moved from Basel to the town of Riehen, where Euler spent most of his childhood. Paul Euler was a friend of the Bernoulli family; Johann Bernoulli was then regarded as Europe's foremost mathematician, and would eventually be the most important influence on young Leonhard.
What important branches of science did Leonhard Euler make important discoveries in?
What year was he born?
How many volumes did his work contain?
What is the name of Eiler's father?
Where did he spend most of his adult life?
What is the name of Europe's foremost mathematician he was friends with?
What was Berlin the capital of?
Did Eluer have any siblings?
What area of study did Euler introduce much of the modern terminology and notation for?
What was the town Euler spent most of his childhood in?
mechanics, fluid dynamics, optics, astronomy, and music theory
 He is also known for his work in mechanics, fluid dynamics, optics, astronomy, and music theory
1707
Leonhard Euler ( ; ; ; 15 April 1707
60 to 80
His collected works fill 60 to 80 quarto volumes
Paul III Euler
Leonhard Euler was born on 15 April 1707, in Basel, Switzerland to Paul III Euler
Saint Petersburg, Russia, and Berlin
He spent most of his adult life in Saint Petersburg, Russia, and in Berlin, then the capital of Prussia
Pierre-Simon Laplace
A statement attributed to Pierre-Simon Laplace expresses Euler's influence on mathematics
Prussia
in Berlin, then the capital of Prussia
yes
He had two younger sisters
mathematical analysis
He also introduced much of the modern mathematical terminology and notation, particularly for mathematical analysi
Riehen
the town of Riehen, where Euler spent most of his childhood