Marsupials key to discovering the origin of heater organs in mammals

Around 100 million years ago, a remarkable evolutionary shift allowed placental mammals to diversify and conquer many cold regions of our planet. New research from Stockholm University shows that the typical mammalian heater organ, brown fat, evolved exclusively in modern placental mammals. The work is published in the journal Science. Around 100 million years ago, a remarkable evolutionary shift allowed placental mammals to diversify and conquer many cold regions of our planet. New research from Stockholm University shows that the typical mammalian heater organ, brown fat, evolved exclusively in modern placental mammals. The work is published in the journal Science. Plants & Animals Evolution Phys.org – latest science and technology news stories