I have been a fan of slime molds ever since I read about them in Steven Johnson’s Emergence; they are fascinating. From a NY Times excerpt of Johnson’s book:

The slime mold spends much of its life as thousands of distinct single-celled units, each moving separately from its other comrades. Under the right conditions, those myriad cells will coalesce again into a single, larger organism, which then begins its leisurely crawl across the garden floor, consuming rotting leaves and wood as it moves about. When the environment is less hospitable, the slime mold acts as a single organism; when the weather turns cooler and the mold enjoys a large food supply, "it" becomes a "they." The slime mold oscillates between being a single creature and a swarm.

In his ongoing series of photographs, Barry Webb captures these bizarre and exotic creatures. Yet another example of not having to look off-world to find alien life. (via colossal)