Researchers in Sweden recovered RNA from a 130-year-old Tasmanian tiger, allowing them to identify which genes were active in its tissues before extinction.

Mars has been sold as a bold escape plan, a backup world for a species that keeps testing the limits of its first one. The harder I look at the technical and ethical record, the more that dream reads ...

Eggs offer an impressive nutritional profile overall, but the best time to eat them can vary based on your health goals. Learn more.

Turn your walk into a better workout, build strength without weights and more exercise advice for the year ahead.