Hidden History

Short, surprising cards on hidden history. Each one is labelled Established, Debated or Speculative, so you always know how solid the evidence is.

• Someone built a stone temple 6,000 years before Stonehenge.

  Established. Göbekli Tepe in southern Turkey is around 11,600 years old. Its giant T-shaped pillars are carved with foxes, boars and vultures. The…

• Woolly mammoths were still alive when the Great Pyramid was built.

  Established. The Great Pyramid of Giza was finished around 4,500 years ago. A small population of mammoths survived on Wrangel Island in the Arctic…

• 9,000 years ago, a town of thousands had no streets. People walked on the roofs.

  Established. Çatalhöyük in central Turkey was home to thousands of people around 7000 BCE. Houses were packed wall to wall, so people climbed in through…

• The first writing wasn't poetry. It was receipts.

  Established. Writing appeared in Sumer, in today's Iraq, around 3200 BCE. The earliest clay tablets mostly record things like grain, beer and sheep.…

• The Library of Alexandria probably didn't burn in one great fire.

  Established. The famous library in Egypt is often imagined going up in flames in a single day. Historians think it faded over centuries instead, through…

• Roman concrete heals its own cracks.

  Established. Some Roman structures have stood for 2,000 years, even in seawater. A 2023 study found small lumps of lime in the concrete. When water…

• There's a stone block in Lebanon heavier than four loaded jumbo jets.

  Established. At Baalbek, Romans built a vast temple to Jupiter. In the nearby quarry lie cut blocks weighing around 1,000 tonnes. The largest, found in…

• Inca stones fit so tightly you can't slide a blade between them.

  Established. At Sacsayhuamán above Cusco, Peru, giant stones with many angled sides lock together without mortar. Some weigh over 100 tonnes. The walls…

• In the Pacific, there's a ruined city built on artificial islands of stone.

  Established. Nan Madol, off the island of Pohnpei in Micronesia, is made of nearly 100 small islands built from stacked basalt columns. Construction…

• A man knocked down a wall in his house and found an underground city.

  Established. In 1963, a renovation in Cappadocia, Turkey, revealed a tunnel. It led to Derinkuyu, a city carved into soft rock, reaching about 85 metres…

• Around 1177 BCE, the ancient world's great powers fell within a few decades.

  Established. The Hittites, Mycenaean Greece and many trading cities collapsed in a short span. Egypt survived but was weakened. Writing disappeared in…

• Farmers digging a well found an army of 8,000 clay soldiers.

  Established. In 1974, farmers near Xi'an, China, struck pottery while digging. They had found the Terracotta Army, buried with China's first emperor,…

• You could once walk from Britain to Denmark.

  Established. After the last Ice Age, a land called Doggerland joined Britain to mainland Europe. People hunted and fished there. Rising seas swallowed…

• Is a hill in Java the world's oldest pyramid?

  Speculative. Gunung Padang in West Java is a terraced hilltop site of stone columns. A 2023 paper claimed parts were built over 20,000 years ago, which…

• A lost Egyptian city was found under the sea in 2000.

  Established. Heracleion was a busy port at the mouth of the Nile, mentioned by ancient writers but never found. Divers located it in Abu Qir Bay.…