Happy Pi Day! We are huge fans of homophones here at SciShow, so we put together a whole bunch of fun facts and tasty tips about PIES! Get it?!

Have you ever wondered: Am I a human being? Ze Frank suggests a series of simple questions that will determine this. Please relax and follow the prompts. Let's begin …

We breathe constantly, but have you ever thought about how breathing works? Discover the ins and outs of one of our most basic living functions-- from the science of respiration to how to control your breaths.

What happens to the clothes we don't buy? You might think that last season's coats, trousers and turtlenecks end up being put to use, but most of it (nearly 13 million tons each year in the united States alone) ends up in landfills....

Obesity is an escalating global epidemic. It substantially raises the probability of diseases like diabetes, heart disease, stroke, high blood pressure, and cancer. But what is the distinction between being overweight and being obese?...

In this video Paul Andersen explains how air pollution is any chemicals in the atmosphere that negatively affect human health. Primary pollutants (like CO, VOCs, NOx, SO2, PM, and Lead) as well as secondary pollutants (like Ozone,...

Robert Wright uses evolutionary biology and game theory to explain why we appreciate the Golden Rule ("Do unto others..."), why we sometimes ignore it and why there’s hope that, in the near future, we might all have the compassion to...

"The Little Prince" is a beloved classic that tells the story of a young prince who travels to different planets and learns valuable lessons about love, friendship, and the importance of seeing the world through a child's eyes. Through...

As a critical resource, water is being called the oil of the 21st century. That is because it is becoming both scarcer and more expensive. Water conservation is not only a good idea, it is a necessity. Where better to start than in the...

Howcast - Let professional makeup artist Patricia Longo teach you how to do Kim Kardashian makeup in this makeup tutorial from Howcast.

Howcast - Learn how to get pretty highlights with this Howcast hair tutorial featuring celebrity hairstylist Jacqueline Bush.

Howcast - Learn how to perform self-hypnosis from clinical hypnotherapist Debbie Catz in this Howcast video.

Howcast - Learn how to do your face makeup like Jennifer Aniston in this Howcast makeup tutorial with expert Patricia Longo.

Howcast - Find out how to make friends from life coach Stephanie Florman in this Howcast video.

Howcast - Learn how to develop charisma from life coach Stephanie Florman in this Howcast video.

Howcast - Learn how to read a person's leg movements in this body language video from Howcast.

Howcast - Learn six tips about the best blue flowers for a wedding from floral designer Sarah Brysk Cohen in this Howcast video about floral arrangements.

Howcast - Learn how to lock dreads in this Howcast hair video about dreadlocks.

Howcast - Learn how to say "yes" in German in this German lesson from Howcast.

Howcast - Learn how to train your parrot to stop screaming from Parrot Wizard Michael Sazhin in this Howcast video.

Howcast - Learn where to buy a tarantula from Jungle Bob in this Howcast video.

Howcast -Learn about music therapy for children with autism from pediatrician and child development expert Asma J. Sadiq, M.D. in this Howcast video.

A yeast infection is an unwelcome combination of itching, irritation, and discharge. It may also cause a burning sensation during intercourse or when urinating. Get on with your day and naturally get rid of a yeast infection.

Teaching robots to blink is hard because it requires mimicking the complex timing, purpose, and subtlety of human reflexes and emotions.