Giant tortoises are large reptiles known for their impressive size and long lifespan, often living over 100 years. They primarily inhabit islands, such as those in the Galápagos and Aldabra atolls. These tortoises have a distinctive dome-shaped shell that provides protection and can weigh several hundred pounds. Their diet mainly consists of grasses, leaves, and fruits, making them herbivores. Giant tortoises play a crucial role in their ecosystems by helping to disperse seeds and maintain vegetation. Unfortunately, they face threats from habitat loss and invasive species, leading to conservation efforts to protect their populations.