Burmese python coiled in the grass in the Everglades. Image Credit: Wikipedia Burmese python males in South Florida undergo a marked seasonal change in testosterone as the breeding period approaches, while another hormone linked to stress and energy use follows a less predictable pattern. A study published in General and Comparative Endocrinology tracked testosterone and…

Scientists have identified a 165-million-year-old mammal predecessor from China that had a broad tail for swimming and throat bones similar to those of modern mammals. Named Megacauda sungei, the Jurassic-era animal could chew and swallow food using specialised structures. Published in Nature, the findings offer new insights into how early mammals developed different feeding abilities….