Photos: The secret of Blue Rats Move Again After Food-Dye Injection

Fifteen minutes after researchers intentionally paralyzed this rat by dropping a weight on its back, they injected the rodent with Brilliant Blue G dye, a derivative of common food coloring Blue Number One. The dye reduced inflammation of the spinal cord, which allowed the rats to take clumsy steps - but not walk- within weeks, a new study says.

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