In the dark

Arthur's Seat, from Blackford Hill, in the dark.

In my astrophysics lab today, for some reason a spectrum which was meant to show a particular scale didn't, and after trying everything possible to fix the problem (including re-doing half of my work from Monday), it still wouldn't work. Even the tutor had no idea why, so eventually he just told me to use someone else's spectrum. I think it's probably the computer acting up, but I'm still in the dark.

Thankfully, even when I'm in the dark, I know the light of life!