Good gallery, but I have two suggestions for the PopSci web-designers:
1. A thumbnail page would be AWESOME. I accidentally closed my window at picture 40 and had to click my way all the way back through all the ones I had already seen.
2. Put the "next"/"previous" buttons in a consistent place!!! All I want to do is park my cursor over the button for the next picture and click through them all. Instead, here I need to constantly go hunting for the button every time there's a picture with a non-standard width.