By RYAN MORRISON FOR MAILONLINE PUBLISHED: 13:25 EDT, 1 June 2021 | UPDATED: 13:25 EDT, 1 June 2021 Giving mice a protein boost can increase their life expectancy by up to 30 percent and make them less susceptible to cancer, according to a new study. The supply of protein SIRT6, which has been found to wane in some mammals with...