The Middle Jurassic is a geological period that lasted from about 174 to 163 million years ago. It is part of the larger Mesozoic Era and follows the Early Jurassic while preceding the Late Jurassic. This period is characterized by a warm climate, which supported diverse ecosystems, including lush forests and abundant marine life. During the Middle Jurassic, dinosaurs became more prominent, with many well-known species emerging, such as the Stegosaurus and Brachiosaurus. The oceans were also rich in life, featuring various ammonites and marine reptiles. This era played a crucial role in the evolution of both terrestrial and marine organisms.