Making Space Food With Space Poop

Making Space Food With Space Poop
A "space toilet" on display at Miraikan, The Emerging Museum of Science and Innovation in Tokyo, Japan in 2008.

One of the difficult aspects of getting humans to Mars is the need to bring food. Researchers are experimenting with a way to make edible "microbial goo" with help from human waste.

(Image credit: Chris Jackson/Getty Images)