Engadget Daily: unlimited clean power, why there's no Retina MacBook Air and more!

So, why hasn't Apple updated its MacBook Air line with a Retina display? Here's our two-word answer: battery life. That's not all we have on deck though -- check out the rest of our news highlights from the last 24 hours, including a breakthrough in fusion power, further decline of the record industry, a Comic Sans typewriter and more.