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In 2012, a shepherd uncovered a bone belonging to a new species of dinosaur on a ranch in Patagonia, in Argentina.

A team from the Museum of Paleontology Egidio Feruglio found more than 150 bones, belonging to six skeletons.

The Patagotitan, a type of titanosaur, was 40 metres long, 20 metres tall and weighed 77 tonnes.

Rachel Naylor spoke to Dr Diego Pol, a palaeontologist who led the dig.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by the past. We take you to the events that have shaped our world through the eyes of the people who were there.

For nine minutes every day, we take you back in time and all over the world, to examine wars, coups, scientific discoveries, cultural moments and much more.

Recent episodes explore everything from the death of Adolf Hitler, the first spacewalk and the making of the movie Jaws, to celebrity tortoise Lonesome George, the Kobe earthquake and the invention of superglue.

We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: Eva Peron – Argentina’s Evita; President Ronald Reagan and his famous ‘tear down this wall’ speech; Thomas Keneally on why he wrote Schindler’s List; and Jacques Derrida, France’s ‘rock star’ philosopher.

You can learn all about fascinating and surprising stories, such as the civil rights swimming protest; the disastrous D-Day rehearsal; and the death of one of the world’s oldest languages.

(Photo: The skeleton of the Patagotitan on display in London in 2023. Credit: Dan Kitwood / Getty Images)

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