Mechas are large, robotic machines often depicted in science fiction and anime. They are typically piloted by humans and can vary in size, design, and purpose. Mechas are commonly featured in stories that explore themes of technology, warfare, and human-machine interaction. In popular culture, mechas can be seen in various media, including movies, video games, and television series. Notable examples include Gundam and Neon Genesis Evangelion, which have significantly influenced the genre. These machines often represent advanced engineering and are used in battles against other mechas or alien threats.