Answer:
Earth's temperature gradually cooled.
Explanation:
As the Cenozoic era proceeded from about 65 million years ago until the start of the ice ages, Earth's temperature gradually cooled. The Cenozoic era, which spans the time from the end of the dinosaurs to the present day, is characterized by a series of major climatic changes, including the transition from a warm, tropical climate to a cooler, more temperate climate.
There are several factors that may have contributed to the cooling of Earth's climate during the Cenozoic era. One possible factor is the changing composition of the Earth's atmosphere, as the concentration of greenhouse gases, such as carbon dioxide and methane, may have declined over time. This could have led to a reduction in the amount of heat trapped in the atmosphere, causing the Earth's surface to cool.
Another possible factor is the movement of the Earth's continents, which can affect the global climate by changing the distribution of land and water on the planet's surface. As the continents moved and shifted over time, they may have created new patterns of ocean currents and wind patterns, which could have affected the Earth's climate.
Finally, the evolution of plant and animal life on Earth may also have played a role in the cooling of the planet's climate. As plants and animals adapted to the changing environment, they may have altered the composition of the Earth's atmosphere and the global climate in ways that contributed to the cooling trend.
Overall, the exact causes of the cooling of Earth's climate during the Cenozoic era are not fully understood, and the subject is a topic of ongoing research and debate among scientists.
