Tiny, translucent glassfrogs increase their transparency two- to threefold while sleeping by temporarily storing red blood cells in their liver, according to a new study in Science. The findings—which provide insight into this unique adaptation in vertebrates—could be used in understanding blood flow more broadly and in the development of new anticoagulants or other cardiovascular drugs. Learn more: https://scim.ag/abl6620 #ScienceReels | Science