From Science Daily: tiny microbes that have been frozen in glacial ice were warmed up very slowly (over nearly a year's time) and now have begun to replicate. The idea behind this is that these antique microbes that are up 1/50th the size of E. coli, may give clues to extraterrestrial life, since some space aliens are stuck with really crappy planets. That's why they're always coming here (in movies) to our verdant planet and trying to take over Washington, DC, even though Venice would provide more water habitats and hiding places.

For the writers, here are 224 titles of extraterrestrial-themed movies, if you want to mine this story and that list for a new story ideas.

I did mention E. coli. Here is a list of eco-horror films.