When my students grow too dependent on their calculators, I ask them to find a number that, when multiplied by itself, gives them 2. Students quickly see that since 1² = 1 and 2² = 4, the answer has ...

I am drawing this reference from this article from someone who I look up to and admire – Dr. Roy Spencer. In the last 100 years, the amount of CO2 in the air has increased from three molecules per ...

Originally defined as the ratio between the circumference of a circle and its diameter, pi — written as the Greek letter π — ...