Life in the swamps The first tetrapods are now thought to have evolved in shallow and swampy freshwater habitats , towards the end of the MISC@1 , a little more than NUMBER@1 million years ago .

The first tetrapods are now thought to have evolved in shallow and swampy freshwater habitats during a time near the end of the MISC@1 , a little more than NUMBER@1 million years ago .
