WSU ending development of marijuana breath test

UNITED STATES - Smoking a little bit of marijuana may change a teen's brain.

That's according to a new study out on Monday afternoon. Researchers studied nearly 50 teens who reported using marijuana at least once by the time they were 14.

There was an increase in brain matter in the areas that deal with memory development and emotions.

Experts say brains normally get thinner during adolescence... not thicker.

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