Fireflies

At Wired:

Tsuneaki Hiramatsu knew something was up. It was the end of December and his amateur photo blog had suddenly jumped from a handful of visitors a day to thousands. The telephone customer service agent and hobby photographer was surprised.
“I was like, what happened?!” says the 35-year-old Hiramatsu, who lives in Okayama City, Japan.
What happened was that Hiramatsu’s long exposure and time-lapse photos of Japanese fireflies had started to go viral. Someone, somewhere, had re-posted his photos and they were spreading across the blogosphere like wildfire.

Pretty awesome.  Makes it seem like summer already.  The details of the photos going viral are there.