Niben

Niben is a fictional planet featured in the *Doctor Who* television series, primarily within the context of the Doctor's adventures in the 51st century. Introduced in the 2008 episode "The Waters of Mars," Niben is depicted as a lush, tropical world with dense forests, vibrant ecosystems, and a rich, diverse culture. It is home to the Nibiruans, an advanced but peaceful species known for their deep connection to nature and their advanced technological and medical knowledge.

The planet's name derives from the ancient Sumerian word "Nibiru," which refers to a mythical celestial body. In the *Doctor Who* universe, Niben serves as a sanctuary for the Doctor and his companions, particularly during the events of the 51st-century storylines. It is described as a place of healing and regeneration, where the Doctor can recover from injuries sustained in his time travels. The planet's natural environment plays a crucial role in its ability to restore life, making it a vital refuge for the Doctor and others in need.

Niben is also notable for its political and social structure. The planet is governed by a council of elders who prioritize harmony with nature and the well-being of all inhabitants. The Nibiruans have developed a society that thrives without the need for traditional warfare or conflict, relying instead on diplomacy and cooperation. Their advanced medical technology allows them to treat even the most severe injuries, which is why the Doctor often seeks refuge there.

While Niben is primarily known through its appearances in *Doctor Who*, it remains one of the few fictional planets in the franchise that is depicted with such depth and detail. Its portrayal reflects themes of healing, renewal, and the balance between technology and nature, making it a significant location within the broader *Doctor Who* universe.