Final answer:
The Cenozoic era is the most recent era on Earth, known for the development of mammals.
Explanation:
The Cenozoic era is the era of 'recent life' on Earth, encompassing the most recent forms of life. It is sometimes referred to as the Age of Mammals, following the Mesozoic era, the age of reptiles when dinosaurs dominated, and the Paleozoic era, characterized by invertebrates and fish.
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