A 10-year-old St. Louis girl is being credited for helping save her grandfather's life after noticing, thanks to her science fair project, that he was having a stroke.

Sophia Tabors tells television station KMOV (http://bit.ly/1SFRkau ) that she decided to study strokes after one of her grandfathers suffered one. The fourth-grader's project won a second-place ribbon.

Two months after the science fair, she sprang to action when her other grandpa suddenly dropped a bag of apples and simply stared at it. Sophia noticed his face was droopy on one side — a symptom of a stroke.

Sophia told her mom what was happening, and she called 911.

Dr. Amer Alshekhlee credits the girl's quick thinking with saving a lot of her grandpa's functions and probably his life.

The grandfather is recovering.

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Information from: KMOV-TV, http://www.kmov.com