Olivier Guyon examines the possibility of finding other planets within astronomical numbers, some potentially rife with life. [6:21]

Provides an explanation, examples, and a video lesson all related to trigonometric identities. [2:31]

Provides advanced information about circles through the use of examples and a brief video lesson. [1:00]

Discover how to graph linear inequalities by taking a look at an example and a video lesson.

Explains angles and parallel lines through examples and a video lesson.

Learn all about the Pythagorean Theorem by viewing examples and a video lesson.

Provides examples and a video lesson that illustrates the distributive property.

Gain an understanding of how to add or subtract polynomials by viewing an example and a video lesson.

Provides examples and a video lesson that illustrate how to solve systems of equations in two variables. [1:43]

Gain an understanding of how to calculate the outcome using a tree-diagram by viewing an example and a video lesson.

Students will plan a human expedition to the planet Mars. Through this project-based activity, they can choose to learn about the surface of Mars, the trip route, the analogical features between Mars and Earth, nutrition and exercise, or...

Peter Campbell explains how sunken cities are studied by scientists to help us understand the lives of our ancestors, the dynamic nature of our planet, and the impact of each on the other. [4:31]

Lake Maracaibo is the stormiest place on the planet. Thunderstorms rage above this massive body of water for up to 200 days of the year, with each ear-splitting event lasting for several hours. Graeme Anderson lists the factors that...

Mona Lisa is one of the best-known faces on the planet. But would you recognize an image of Leonardo da Vinci? Illustrator Siegfried Woldhek uses some thoughtful image-analysis techniques to find what he believes is the true face of...

Blue whales are the largest animals on the planet, but what helps them grow to the length of a basketball court? Asha de Vos explains why the size of krill make them the ideal food for the blue whale. [5:21]