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The Bantu expansion changed Africa. Scientists are still tracing how.

PolicyNovember 7, 20261 min read

Scientists are studying how the Bantu expansion, a long migration of Bantu-speaking peoples from western Africa, reshaped much of the continent. The story looks at ancient iron-making in Great Zimbabwe as one example of their impact.

Ancient iron furnaces in southern Africa

Near the ruins of Great Zimbabwe, a rich kingdom in southern Africa from about 1000 to 1700 AD, people built many iron-smelting furnaces. Some of these furnaces were designed to pull air in and push it out through a chimney, so no workers had to blow air in by hand. This made iron-making much easier. Researchers say the furnaces show skilled and well-organized iron production.

Key facts

Great Zimbabwe was the capital of a thriving kingdom from 1000 to 1700 AD.
The furnaces needed heat of more than 2,100 degrees Fahrenheit to smelt iron.
Bantu speakers began spreading across southern Africa about 6,000 to 4,000 years ago.
Around 350 million Africans speak one of roughly 500 Bantu languages today.

Who were the Bantu speakers?

Bantu speakers are communities that began moving from western Africa across the southern half of the continent thousands of years ago. They brought a settled way of life. This included farming, keeping animals, making pottery, and working metal. Before this, many areas were home to hunter-gatherer groups who moved around to find food.

Why this matters

The Bantu expansion changed Africa's history, technology, and languages. Many people alive today speak Bantu languages, and many others carry Bantu ancestry in their DNA. Studying this migration helps scientists understand how people and ideas spread across the continent.

What to watch

Scientists, such as archaeometallurgist Ezekiel Mtetwa, are still studying the furnaces and the peoples who built them.
Researchers continue to trace the Bantu expansion using languages, objects, and DNA.

Glossary

Bantu speakers: Communities whose languages belong to the Bantu language family, which spread across southern and eastern Africa.

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