Hank introduces us to the most beautiful numbers in nature - the Fibonacci sequence.

Hank brings you the news of a newly discovered dinosaur he is kind of afraid to look at, a way to sequence your genome in less time than it takes to get your clothes dry cleaned, & two new adventures that will take place in space - one...

With the question “What is life?” addressed at the molecular level, humanity could finally cure all disease and live forever… Except, not really. It turns out we're complicated.

Paul Andersen explains how genes are regulated in both prokaryotes and eukaryotes. He begins with a description of the lac and trp operon and how they are used by bacteria in both positive and negative response. He also explains the...

Rajesh Rao is fascinated by "the mother of all crossword puzzles": how to decipher the 4000-year-old Indus script. He's enlisting modern computation to try to read this lost language, the key to understanding this ancient civilization.

Only 4 steps stand between you and the secrets hidden behind RSA cryptography. Find out how to crack the world's most commonly used form of encryption.

Set theory is supposed to be a foundation of all of mathematics. How does it handle infinity?

People have been grappling with the question of artificial creativity -- alongside the question of artificial intelligence -- for over 170 years. For instance, could we program machines to create high quality original music? And if we...

As different as we humans are from one another, we all age along the same great sequence, and the shared patterns of our lives pass into the pages of the books we love. In this moving talk, journalist Joshua Prager explores the stages of...

Imagine trying to use words to describe every scene in a film, every note in a song, or every street in your town. Now imagine trying to do it using only the numbers 1 and 0. Every time you use the Internet to watch a movie, listen to...

In this math video, viewers are guided step by step through solving a problem where the first four terms of a geometric sequence are given and the goal is to write an equation for the nth term. The exemplar solution begins by introducing...

In this short math video we will use the common ratio of a geometric sequence to find the first term. We will review the definition of a geometric sequence. A geometric sequence, is a sequence of non-zero numbers where each term after...

In this math video, we’ll explore how to find the nth term of an arithmetic sequence step by step — using the problem:
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The first term of an arithmetic sequence is 5. The third term is 13. Which of the following...

The seven common ways authors organize informational text

A video entitled "Recursive Formula Geometric" that covers the adding numbers to a given sequence.

A video entitled "Recursive Formula Arithmetic" which talks about arithmetic sequences.

A video entitled "Explicit Formula Geometric" that covers how to find future terms in a geometric sequence.

A video entitled "Explicit Formula Arithmetic" which talks about arithmetic sequences.

This video explains the fundamental programming structures of sequences, selections, and loops. Sequences involve completing actions in a specific order, selections make decisions based on questions asked, and loops repeat actions until...

An explanation of the difference between 'than' and 'then'. Learn the easy trick to help you know when to use each and avoid the mistake many native English speakers make. …

Howcast - Learn how to do dance move combos from jazz dance expert Liz Piccoli in this Howcast dance video.

Howcast - Learn how to wait tables from restaurateur Paul Bolles-Beaven in this Howcast video.

Howcast - Learn five tips for lead climbing from indoor rock climbing expert Cliff Simanski in this Howcast video.

Howcast - Learn how to play Chet Atkins-style country guitar from musician Boo Reiners in this Howcast video.