The Blues

I tend to think this guy is the best blues player around:

Acoustic Guitar to Ease your Soul... One-Hour of Relaxing Instrumental Blues Guitar

I just noticed that his YouTube channel subscribers count stands at 1.72 million.

Reimagining Energy

Here's something I hadn't heard about until today:

X-energy (Xe-100 Short Technology Explainer)

No mention of operation costs except in the comments.