Almost 150 years ago, English scientist Francis Galton coined the phrase "nature versus nurture" — and proposed that research on twins could resolve the debate.
Genetics have long seemed to weigh heavily in favor of the role of nature in shaping the people we become. But even identical twins are different to varying degrees, and some researchers believe those differences suggest a third influence at work, called epigenetics.
Last Wednesday, Ann Selzer could not be cajoled into even a hint of the final Iowa poll as she joined the Political Junkie. Selzer and the company - and her company polls for the Des Moines Register and for Bloomberg. It's considered the gold standard in Iowa. And the Register published the results on Saturday night. It showed Mitt Romney in front, followed closely by Ron Paul and Rick Santorum surging into third. Ann Selzer joins us again from Iowa Public Radio. Nice to have you back on the program.
This is TALK OF THE NATION. I'm Neal Conan, in Washington. In Iowa, all the GOP presidential candidates continue to profess their faith in speeches and in broadcast ads, perhaps none more than Texas Governor Rick Perry.
And now, the Opinion Page. It's the start of a new year. Already, millions of us have posted new calendars on the wall or installed new ones on our computers. But Steven Hanke and Richard Henry, two Johns Hopkins University professors, propose a more radical step: the Hanke-Henry permanent calendar, which they say will solve the yearly hassle of reworking our schedules and even help businesses put fiscal calendars in sync. But that raises a question: Is the current calendar a problem for you?
This is SCIENCE FRIDAY. I'm Ira Flatow. When you look back on 2011, what will you remember, the Fukushima nuclear disaster following the tsunami? What about the death of Steve Jobs, founder of Apple and the pioneer of personal computing? How about the world's population reaching seven billion?