What are the best YouTube channels for learning, growth, and development?

Here's my list, contains some new and unknown channels:
Independent Science

• Tell me why - Weekly dose of science videos
  
  

• Minute Physics – Science questions answered and broken down quickly and thoroughly with drawings to illustrate.

• ASAP Science – Similar to Minute Physics – mini science lessons illustrated through wipe board drawings.

• The Slow Mo Guys - 2 ragazzi fanno esperimenti video e li rallentano per indagare su ciò che accade realmente.

• Smarter Every Day - video scientifici che esplorano il mondo e rispondono alla domanda del perché.

• Vsauce - risposte a domande scientifiche ordinarie e stupefacenti, e fatti sconvolgenti.

• Sci Show - discussioni e domande sulle notizie scientifiche di oggi.

Educazione e apprendimento permanente

• Soulpancake - una grande varietà di video e programmi per farti aprire il tuo cuore e la tua mente, incluso il popolarissimo Kid President.

• Crash Course - Sei corsi da cui imparare - Storia degli Stati Uniti, Chimica, Storia Mondiale, Biologia, Letteratura ed Ecologia.

• Google for Education – News, tips, stories and more

• PBS – Programming, children’s videos and more

• Edutopia – for tech-savvy teachers, promoting online learning.

• TED Talks – lectures, demonstrations and lessons in 18 minutes from icons and geniuses. incredible lectures, demonstrations and performances spanning every discipline imaginable.

• Amy Poehler’s Smart Girls – Exploring cultures and the world along with advice from Amy Poehler

Teachers

• Karen Mensing – 2nd grade teacher, YouTube Teacher Star, Arizona’s Gifted Teacher of the Year 2011, Teacher of the Year 2012.

• WowMath – Mr. Robb’s math lectures on Algebra and Calculus.

Science Giants

• NASA Television – NASA videos, tv and reports about space.

• World Science Festival – science news, interviews and information

• Scientific American – science news and lessons from Scientific American.

• Nature Videos – Meet the scientists behind the research.

• NOVA – science news and information.

• Nat Geo Wild – National Geographic’s channel on animals and ecosystems.

• Wired – Technology and gadgets from WIRED

• Smithsonian – The museums videos on everything and anything.

• Science Channel – science news, information and stories from around the world.

Kid-Hosted

• Doctor Mad Science – simple science experiments, hosted by 11-year-old Jordan.

• Whiz Kid Science Experiments – easy experiments for kids done by a kid.