1) It is named after Lake Chad. This is the second-largest lake in Africa, but has shrunk by 90% since the 1960s. Its basin covers parts of Nigeria, Niger, Chad and Cameroon, and is a water source for between 20 million and 30 million people.
2) The Sahara Desert roughly covers one third of the country. Much of the north is desert and home to a mere 1% of Chad’s population. The south has large expanses of wooded savannahs and woodlands.
3) Remains of a seven-million-year-old human-like creature – or hominid – known as “Toumai” were unearthed in 2001. Its discoverers argued that Toumai was the oldest hominid known to science.
4) Chad became an oil-producing nation in 2003, with the completion of a $4bn (£2.87bn) pipeline linking its oilfields to terminals on the Atlantic coast. The industry has been plagued by allegations of corruption.
5) Agriculture is the main source of livelihood for most people – cotton is grown in the south, and exported to Europe and the US.