CAMBRIDGE, UNITED KINGDOM - DECEMBER 09: A scientist lowers biological samples into a liquid nitrogen storage tank at the Cancer Research UK Cambridge Institute on December 9, 2014 in Cambridge, England. Healthy and cancerous biological samples are stored at -196degrees to preserve them for use laboratory tests and experiments. Cancer Research UK is the world's leading cancer charity dedicated to saving lives through research. Its vision is to bring forward the day when all cancers are cured. They have saved millions of lives by discovering new ways to prevent, diagnose and treat cancer, and as such the survival rate in the UK has doubled in the last 40 years. Cancer Research UK funds over 4,000 scientists, doctors and nurses across the UK, more than 33,000 patients who join clinical trials each year and a further 40,000 volunteers that give their time to support the work. (Photo by Dan Kitwood/Getty Images/Cancer Research UK)