The scientists raised mice lacking normal gut microflora, then compared their behavior, brain chemistry and brain development to mice having normal gut bacteria.

FORBES: Thinking With Your Gut. Literally.

We can't gut our investments in research and development and in clean energy to solve our deficit challenges.

WHITEHOUSE: Press Briefing by Deputy Press Secretary Josh Earnest

Scientific American has a fascinating little article about how the bacteria in your gut may actually impact your mental development.

FORBES: Thinking With Your Gut. Literally.

But this new study is the first to extensively evaluate the influence of gut bacteria on the biochemistry and development of the brain.

FORBES: Thinking With Your Gut. Literally.

Mr. Obama offered a bleak picture of the plan's impact, were it to become law, saying it would gut education and research-and-development programs, cause a rise in crime and increase health-care costs.

WSJ: Obama Blasts GOP Budget as 'Trojan Horse'

The research adds weight to the idea that gut bacteria are a critical part of the overall development of mammals.

BBC: Bacteria in mouse gut affect development and behaviour