Eocene

The Eocene is a geological epoch that occurred about 56 to 34 million years ago, marking a period of significant Earth changes. During this time, the planet was warmer than today, with lush forests thriving in regions that are now cooler. Many modern groups of animals, including early horses, primates, and whales, appeared or diversified. The Eocene saw the breakout of continents toward their current positions, and the climate gradually cooled near its end, leading to the development of more recognizable ecosystems similar to today’s. It is an important era for understanding Earth's evolutionary and environmental history.