Definition of float in the AudioEnglish.org Dictionary. Meaning of float. What does float mean? Proper usage and pronunciation (in phonetic transcription) of the word float. Information about float in the AudioEnglish.org dictionary, synonyms and antonyms.
Mammals evolved from a group of mammal-like reptiles called the Synapsids, specifically the Therapsids, in the Triassic period, around 250 million years ago.
In fact, if birds evolved from dinosaurs, the reptiles from which the mammals evolved disappeared even before them. In fact, they ruled the Earth before the emergence of the dinosaurs. Because they have already many traits hinting to mammals (like differentiated teeth), they were called mammalian reptiles.