The first item is mainly for the amazing picture from National Geographic, an x-ray image of a bolt of lightning. You can read about how it was done and some speculation on what it means, but shouldn't you have clicked by now in order to see an x-ray image of lightning?
Second comes a report with editorial (new journalism is nearly the only journalism now) from Slate. The article heralds a piece of audio hardware that allegedly makes those compressed, tinny MP3 files you downloaded sound all analog warm.
The USB-DAC could be the gold-coated CD of the 2000-teens or it could be the next stereo component you actually need.