“There are five fundamental operations in mathematics,” the German mathematician Martin Eichler supposedly said. “Addition, subtraction, multiplication, division and modular forms.” Part of the joke, ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Every pure mathematician has experienced that awkward moment when asked, “So what’s your research good for?” There are standard responses: a proud “Nothing!”; an explanation that mathematical research ...

Practice time! Build, read, & write three-digit numbers using base-10 blocks and symbols. Practice time! Build, read, write (in standard and expanded form), and represent three-digit numbers using ...

Biology is the scientific study of life. Chemistry is the science that examines chemicals and their interactions with one another. Physics includes motion, force, temperature, and sound waves—all ...

Our civilization is centered around mathematics, which has a past that is frequently mixed up with philosophical history. Mathematics is used extensively in a variety of daily tasks like driving, ...

Artists and poets have long been inspired by the mathematical patterns found in nature—for instance, the remarkable fact that a sunflower's seeds follow the Fibonacci sequence. But there are myriad ...