The ice covering the Arctic Ocean was at a record low, in keeping with a sharp warming trend in the far north. At the same time, the amount of the ocean around Antarctica covered by sea ice hit a record high. It's winter in Antarctica when it's summer in the Arctic. But why in a warming world is wintertime ice growing?
Originally published on Mon October 8, 2012 6:50 am
British researcher John Gurdon and Shinya Yamanaka of Japan have won this year's Nobel Prize in medicine or physiology. They won "for the discovery that mature cells can be reprogrammed to become pluripotent."
A small, fanged dinosaur called Pegomastax africanus was identified this week, more than half a century after its skeleton was dug up in South Africa. The dinosaur looked like a fierce cross between a chicken and a porcupine, and had long fangs which it used to eat plants and compete for mates. Pegomastax was a diminutive beast, standing less than two feet tall and weighing no more than a small house cat.
In California, state officials are planning a multibillion-dollar environmental restoration of the inland delta near San Francisco Bay. There's only one problem: No one knows what the landscape used to look like. Ninety-seven percent of the original wetlands are gone, so the state is turning to historians for help.
This detective story begins on a sunny day in a dry field of corn, about an hour east of San Francisco.
A recent study conducted at the University of Pennsylvania identified key molecules involved in forming long-term memories. Experts discuss how this is the latest in a growing field of research on how our bodies regulate our genes, and how this process affects our memories.
Up next, turning stem cell into mouse eggs. Scientists have been growing stem cells in the lab for nearly 15 years now. And in that time they've learned to transform stem cells into pretty much anything they wanted to - heart cells, liver cells, brain cells. But now a group of Japanese scientists has raised the bar by transforming mouse stem cells into mouse eggs. And not only do they look like eggs but they can be fertilized and developed into healthy mice.