This is the skull of an extinct short-faced kangaroo (Simosthenurus occidentalis). Ancient DNA from these animals reveals they are a highly distinct evolutionary lineage. Scientists have finally managed to extract DNA from Australia's extinct giant kangaroos - the mysterious marsupial megafauna that roamed Australia over 40,000 years ago.

Eczema wreaks havoc on its sufferers' lives with health problems that are more than skin deep. Adults who have eczema -- a chronic itchy skin disease that often starts in childhood -- have higher rates of smoking, drinking alcoholic beverages and obesity and are less likely to exercise than adults who don't have the disease, reports a new Northwestern Medicine® study.

A new device that can rapidly concentrate and extract young cells from irrigation fluid used during orthopaedic surgery holds promise for improving the delivery of stem cell therapy in cases of non-healing fractures. UC Davis surgeons plan to launch a "proof-of-concept" clinical trial to test the safety and efficacy of the device in the coming months.