Early humans

Hands performing sign language

Humans invent language

The development of human language is one of the most significant achievements in our species’ history. This revolutionary leap, which likely began in Africa over 135,000 years ago, transformed our survival capabilities. Language enabled complex social cooperation, allowing early humans to coordinate intricate hunting and migration strategies. More profoundly, it provided the cognitive framework for cumulative learning and the building of cultural memory, paving the way for all subsequent human innovation and success.

Model of a female Australopithecus afarensis.

Y-chromosomal Adam, the most recent common ancestor of all males, is born

Y-chromosomal Adam is the name scientists give to the most recent common paternal ancestor of all living men. Genetic studies show that every Y chromosome today traces back to this individual, who lived in Africa around 200,000 to 300,000 years ago. His story is not about one man alone, but about the shared roots of humanity. By studying haplogroups and Y-chromosome mutations, researchers continue to refine when and where he lived. Y-chromosomal Adam reminds us that beneath all differences, we are deeply connected—a single family bound together across time by shared ancestry.

Island off the shore of the Azores

The Azores are discovered, possibly by Vikings

Although it was traditionally believed that Portuguese explorers were the first humans to arrive on the Azores – an archipelago composed of nine volcanic islands in the Macaronesia region of the North Atlantic Ocean – there is evidence to suggest otherwise. Researchers have discovered that 5-beta-stigmasterol is present in sediment samples from between 700 and 850 C.E. This compound is found in the feces of livestock, such as sheep and cattle, neither of which are native to the islands. Additionally, mice on the Azores were discovered to have mitochondrial DNA suggesting they first arrived from Northern Europe, suggesting that they were brought to the islands by Norwegian Vikings.