We know that mammals cannot regenerate lost limbs but they can repair large sections of their ribs. A team of US researchers has now discovered the healing power of the rib cells in both humans and mice.
Paleontologists have affirmed the idea that mammals, an extremely diverse group that includes egg-laying monotremes, originated at least 208 million years ago, much earlier than some previous works of research suggest.
A new study suggests that the advance and retreat of the ice sheets millions of years ago had a profound influence in the evolution and geographic distribution of many animals, including those that live today in the Arctic regions.
A new study has shown that humans and other primates burn 50 percent fewer calories each day than other mammals, suggesting that these remarkably slow metabolisms explain why humans and other primates grow up so slowly and live such long lives.