Take a look at these animated MRIs of a pineapple, an orange, and a bushel of bananas:
Animated MRI Scans of Fruits are Hypnotic, High in Fiber.
Update: Many more of these can be found at Insideinsides.

Monterey Bay Aquarium: Anthology of Deep Sea Squids. Amazing foootage!

Luke Jerram’s Glass Microbiology:

“These transparent glass sculptures were created to contemplate the global impact of each disease and to consider how the artificial colouring of scientific imagery affects our understanding of phenomena. Jerram is exploring the tension between the artworks’ beauty, what they represent and their impact on humanity.”

Links via Evil Mad Scientist Laboratories.