This robot was constructed in 1987 by Dr. Kenneth Kinzler and his colleagues at the Johns Hopkins Oncology Center's Molecular Genetics Lab run by Dr. Bert Vogelstein. It was used to conduct PCR in research on the p53 gene, which is linked to 50 percent of human cancers. Polymerase chain reaction,

A polymer is made up of tiny molecules in long, repeating chains, like paper clips hooked together. Polymers are all around us—even in our own bodies! Here's how you can make your own. This activity from Spark!Lab includes step-by-step directions, discussion questions, and ideas for extending y