Scientistshavediscoveredthat（61）___（stay）inthecoldcouldhelpusloseweight．ResearchersattheUniversityofCaliforniafoundthatexposuretothecoldincreaseslevelsofaproteinthathelpsformbrownfat-thetypeoffatthatp

　　Scientists have discovered that （61）___ （stay） in the cold could help us lose weight．Researchers at the University of California found that exposure to the cold increases levels of a protein that helps form brown fat-the type of fat that produces heat and keeps us warm．Brown fat burns energy，（62）___ helps us lose weight．White fat stores extra energy，which results （63）___ weight gain．The researchers said that because air conditioning and heating give us constant， （64）___ （comfort） temperatures，our body's need for brown fat has decreased．They found that："Outdoor workers in northern Finland who （65）___ （expose） to cold temperature have （66）___significant amount of brown fat when （67）___（compare） to same-aged indoor workers．"

　　The research was conducted on two different control groups of mice．（68）___ group was injected with the protein that helps create brown fat．This group later gained 30% less weight after both groups were fed high-fat diets．The researchers say this could be good news in the fight against obesity．People who are obese have （69）___（low） levels of brown fat than thinner people．Head researcher Hei Sook Sul said："This protein could become an important target for research into the treatment and prevention of obesity and obesity-related diseases．"She added："If you can somehow increase levels of this protein，you could （70）___ （possible） lose more weight even if eating the same amount of food．"