Toumai (Sahelanthropus tchadensis): The Seven-Million-Year Skull
The cranium was named Sahelanthropus tchadensis in 2002 and is widely treated as one of the oldest possible hominins, although its status remains debated.
Every Chronicle article on world history, newest first: battles, empires, disasters, discoveries and revolutions.
The cranium was named Sahelanthropus tchadensis in 2002 and is widely treated as one of the oldest possible hominins, although its status remains debated.
One of the richest dinosaur fossil sites known, protected as a provincial park in 1955 and a UNESCO World Heritage Site in 1979.
The Sun ignited at the centre of a spinning disc of gas and dust, and within tens of millions of years the planets, moons, asteroids and comets had formed.
Three very large earthquakes and thousands of aftershocks reshaped the land, created Reelfoot Lake and led to the first US federal disaster relief act in 1815.
Poland was defeated and partitioned between Germany and the Soviet Union, and Britain and France declared war on Germany, beginning the Second World War in Europe.
The heir to the Austro-Hungarian throne and his wife were killed, triggering the July Crisis that led to the First World War.
The Hausa kingdoms were overthrown and replaced by the Sokoto Caliphate, a federation of emirates that lasted until the British conquest of 1903.
France sold its claim to Louisiana to the United States for about 15 million dollars, roughly doubling the area of the young republic.
Volta's pile gave scientists their first source of continuous electric current, launching electrochemistry and the study of electric circuits.
The Directory was abolished and replaced by a provisional Consulate, which led to the Constitution of Year VIII and Bonaparte's rule as First Consul.
Tiwanaku became the dominant city and religious centre of the southern Andes before declining around 1000–1150.
The three Nubian kingdoms adopted Christianity as their official religion, beginning a Christian Nubian civilisation that lasted until the 15th century.