A Northwestern University scientist describes new research that used an innovative experimental approach to provide unique insights into how scientists can change human metastatic melanoma cells back to normal-like skin cells -- by exposing the tumor cells to the embryonic microenvironment of human embryonic stem cells, the zebra fish and the chick embryo.

During the last 10,000 years climate has been seesawing between the North and South Atlantic Oceans. Cold periods in the north have corresponded to warmth in the south and vice versa. These results imply that Europe may face a slightly cooler future than predicted by IPCC, the Intergovernmental Panel on Climate Change.