When the ability to have movement across social class becomes virtually impossible, I think it is the beginning of the end of a country. And because education is so critical to success in this country, if we don't figure out a way to create greater mobility across social class, I do think it will be the beginning of the end.

Scientists like ripping problems apart, collecting as much data as possible and then assembling the parts back together to make a decision.

The big idea we start with is: "How is the genome interpreted, and how are stable decisions that affect gene expression inherited from one cell to the next?" This is one of the most competitive areas of molecular biology at the moment, and the students are reading papers that in some instances were published this past year. As a consequence, one of the most common answers I have to give to their questions is, "We just don't know."

When the ability to have movement across social class becomes virtually impossible, I think it is the beginning of the end of a country. And because education is so critical to success in this country, if we don't figure out a way to create greater mobility across social class, I do think it will be the beginning of the end.