An anonymous reader writes "Samantha Garvey, a senior at Brentwood High School, has managed to become one of the remaining 300 semifinalists in the Intel Science Talent Search this year. Her research focused on mussels and on her discovery that they change the thickness of their shells if a predator such as crabs are introduced. Why is Garvey's achievement so impressive? Because she and her entire family are homeless, and rely on a local homeless shelter. Such a situation would stop many students from being able to focus on studying, let alone a research project, but Garvey has instead used her situation as motivation."