These are the popular science videos we liked the most this week:

Head Squeeze: what do schools of fish have to do with FC Barcelona?

Periodic Videos: the super heavy and super expensive irridium.

TED-Ed: will T. Boone Pickens pull out his shotgun and shoot, when asked uncomfortable questions about shale gas and fracking, which he invested a lot of money in?

Computerphile: look at this awesome robot building circuit boards!

PBS Idea Channel: third wave feminism for dummies.

Numberphile: a formula, using this constant, produces only primes! Unfortunately it's not that easy to use this constant.

TED-Ed: how dyslexia works?

Playlist