to learn more about steroids, check out the taylor hooten foundation at taylorhooten.org >>> stay with us. there's lots more ststststststs, on "teen kids news." >> we'll be right back. that complements my lashes' natural growth cycle. 96% saw instantly longer lashes. this is the start of something big. revlon growluscious mascara. >>> the competition is fierce. the preparation can take years. i'm not talking about sports. i'm talking about the top science prizes in the country. erika found out what it takes to succeed. >> reporter: these excited teens are competing for thousands and thousands of dollars in scholarships. they're finalists in the "yes" competition, vying for one of the top science prizes for high school students. [ cheers ] "yes" stands for young epidemiology scholars. epidemiology is the study of diseases and these students are focusing on public health. the judges were impressed. this kind of research is usually expected from students going for advanced degrees in college. >> the work we saw this weekend was graduate-level work and these are high school kids. and that'