This Week in Science and Technology (TWiST) March 1 2013

Welcome to TWIST - your weekly dose of science news. Brought to you by ScienceAlert! Join your hosts Dr. Carin Bondar and Dr. Phil Plait as they discuss the link between breastfeeding and ovarian cancer, a comet soaring over Mars, and the incredible powers of spider silk. Story Links: Cancer and Breastfeeding: Martian Comet: Spider Silk: Check out ScienceAlert on facebook: Follow us on Twitter: @sciencealert Subscribe to our YouTube Channel for great science content! Follow us on G+: +ScienceAlert