Science Friday

DNA is the universal programming language for life, and the specific code to that program are the combination of the base pairs adenine, guanine, cytosine and thymine. But are those the only base pairs that could be used to create DNA? Scientists looking into this question were able to create 4 different base pairs that don’t exist in nature. Chemist Floyd Romesberg, biologist Jef Boeke, and bioethicist Debra Mathews tell Ira how altered genomes could be used for creating novel medicines and fuels—and whether this is considered a new form of life.

Plus: The climate is changing. Globally, of course. But also in Washington, where growing numbers of Republicans are jumping behind policies that would result in meaningful action on climate change. And yet, even as Congress appears ready to at least discuss the issue, and the government’s own scientists and military leaders sound louder alarms about the impending dangers of global climate change, the White House is assembling a group of climate change adversaries to counter those mainstream views. David Titley, a retired rear admiral who founded the Navy's task force on climate change, explains.

Last year, China tightened standards for recycled materials it would accept, and now local recyclers nationwide find themselves struggling to find new homes for plastics, cardboard, and other materials that fell below par. Dana Bate, health and science reporter for WHYY, tells Ira how Philadelphia and its suburbs are handling the issue in the State of Science.

And Sophie Bushwick, technology editor for Scientific American, explains how extreme climate change might cause stratocumulus clouds to disappear for good, and other top science news headlines, in this week's News Roundup.