We can't live without them, nor can most animals that wear their skeletons on the inside. However, some extraordinary amphibians no longer bother with these delicate, mucus-y organs.
We can't live without them, nor can most animals that wear their skeletons on the inside. However, some extraordinary amphibians no longer bother with these delicate, mucus-y organs.
Scientists have discovered that some lungless animals start to grow these breathing organs at first, and then their developmental process has a change of heart., have gotten away with being lungless by breathing through their slimy skin and mouth tissues instead for at least 25 million years.
Little is known about how these amphibians misplace their lungs, so Harvard University evolutionary biologist Zachary Lewis and colleagues took a closer look at these cold-blooded water lovers.