Positive Psychology is a relatively new branch of psychology as introduced in 1998 by Professor Martin Seligman, but it has quickly developed a large following amongst practitioners around the globe. It concentrates on studying and promoting positive human functioning, and developing effective interventions that help to support thriving individuals, families, and communities. Positive psychology aims to go beyond just treating mental illness, and...

We commonly define the Pythagorean theorem using the formula a2 + b2 = c2. But Pythagoras himself would have been confused by that. Explore how this famous theorem can be explained using common geometric shapes (no fancy algebra required), and how it’s a critical foundation for the rest of geometry.

This is the short tale of a young boy as he prepares his neighborhood for Christmas. That is until he confronts the one lady who doesn't want the holiday to come at all.

The Bon Appétit Test Kitchen is on a quest for perfection, from the perfect pizza to what makes the perfect Thanksgiving meal.

Clear diction and phrasing are fundamental to vocal artistry. In this episode, explore how we communicate meaning through pronunciation and syllabic stress. Begin to work with phrasing, how words are stressed relative to each other, and which words to emphasize as important. Consider how to place vowels and consonants in a sung phrase, and start to address intention and meaning in singing text.

Using the laws of physics and electromagnetic radiation, astronomers can "weigh" a galaxy by studying the distribution of its rotating hydrogen. But when they do this, it soon becomes clear something is very wrong: A huge proportion of the galaxy's mass has simply gone missing. Welcome to the topsy-turvy world of dark matter - which we now believe accounts for 90 percent of our own Milky Way.

Learn how the advent of musical synthesizers and the tape recorder gave rise to both electronic music (using sounds created electronically) and musique concrète (manipulating real sounds with a tape recorder). Witness how Ultraserialism developed within Europe, leading paradoxically to hyper-complex music which in performance sounded random - a fatal problem for listener comprehension.

Stoichiometry may sound highly technical, but it is simply the relative proportions in which chemicals react. Discover how to balance a reaction equation, and learn how to solve problems involving limiting reagents, theoretical yield, percent yield, and optimized reactions.

When two particles are part of the same quantum system, they may be entangled with each other. In their famous "EPR" paper, Einstein and his collaborators Boris Podolsky and Nathan Rosen used entanglement to argue that quantum mechanics is incomplete. You chart their reasoning and Bohr's response.

Did you know that if you see a shocking photograph, you'll experience the emotion even before the image registers consciously in your mind? Why is this? What's happening in your brain? Investigate the physical process behind emotions, including the neurological "fast path" that accelerates our reaction to external threats.