In 2011, after months of little or no rain in central and eastern Europe, water levels on some parts of the Danube River fell to their lowest level in 70 years.

It’s one of Europe’s busiest shipping routes, but in November of that year, traffic ground to a halt on major sections of the Danube, and, on the Serbia-Hungary border, dozen of cargo ships were stranded.

In Romania, one of the country’s nuclear power stations was at risk of shutdown because of insufficient water for cooling, and, in Serbia, the drought revealed sunken World War Two ships and unexploded bombs.

In the lower Danube, low water levels also caused a decrease in bird and fish populations.

Kristian Yakimov, an ecologist and tourist guide in Bulgaria, speaks to Jacqueline Paine.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by and curious about 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 how the Excel spreadsheet was developed, the creation of cartoon rabbit Miffy and how the sound barrier was broken.

We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: the moment Reagan and Gorbachev met in Geneva, Haitian singer Emerante de Pradines’ life and Omar Sharif’s legendary movie entrance in Lawrence of Arabia.

You can learn all about fascinating and surprising stories, like the invention of a stent which has saved lives around the world; the birth of the G7; and the meeting of Maldives’ ministers underwater. We cover everything from World War Two and Cold War stories to Black History Month and our journeys into space.

(Photo: Cracked, muddy ground at the river bank of the Danube river. Credit: Alexanda Rilich/Getty Images)

In October 1982, Paraguay and Brazil closed the gates of the Itaipu River, beginning to fill the reservoir of what would soon be the world's largest dam. Located in a rainforest on the border between the two countries, the Itaipu dam would go on to supply vast amounts of energy for decades. But the rising waters also put thousands of animals at risk, as their habitat was flooded.

To mitigate this, the company launched one of the largest wildlife rescue operations in South America. It was called Mymba Kuera - "the animals" in Guarani, the local language. Dario Perez Chena led the operation on the Paraguayan side. He spoke to Stefania Gozzer about the challenges his team faced in saving nearly 30,000 animals.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by and curious about 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 how the Excel spreadsheet was developed, the creation of cartoon rabbit Miffy and how the sound barrier was broken.

We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: the moment Reagan and Gorbachev met in Geneva, Haitian singer Emerante de Pradines' life and Omar Sharif's legendary movie entrance in Lawrence of Arabia.

You can learn all about fascinating and surprising stories, like the invention of a stent which has saved lives around the world; the birth of the G7; and the meeting of Maldives' ministers underwater. We cover everything from World War Two and Cold War stories to Black History Month and our journeys into space.

(Photo: A rescue team trying to grab a monkey. Credit: Itaipu Binacional)

In October 2012, a local historian stumbled upon a misplaced pamphlet in the Danish Archives.

It was a story called the Tallow Candle and is believed to be Hans Christian Andersen’s first fairytale.

Ejnar Askgaard, Curator and Senior Researcher at Museum Odense, verified the document.

He speaks to Surya Elango.

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by and curious about 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 how the Excel spreadsheet was developed, the creation of cartoon rabbit Miffy and how the sound barrier was broken.

We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: the moment Reagan and Gorbachev met in Geneva, Haitian singer Emerante de Pradines’ life and Omar Sharif’s legendary movie entrance in Lawrence of Arabia.

You can learn all about fascinating and surprising stories, like the invention of a stent which has saved lives around the world; the birth of the G7; and the meeting of Maldives’ ministers underwater. We cover everything from World War Two and Cold War stories to Black History Month and our journeys into space.

(Photo: Hans Christian Andersen. Credit: Hulton-Deutsch Collection via Getty Images)

Aceh in Sumatra is the only Indonesian province where Sharia Law, Islamic religious law, is in force. It followed years of conflict between Aceh and the central government.

In Arabic, Sharia means "the clear, well-trodden path to water". It is derived from the Quran, Islam's holy book and from the teachings of the Prophet Muhammad.

Interpretation of Islamic law is nuanced according to local culture and customs, which means the application of Sharia Law may look quite different from country to country.

Azwar Abubakar was the acting governor of Aceh who oversaw the first implementation of Sharia Law - a public caning - on 24 June 2005. He speaks to Surya Elango.

(Photo: Azwar Abubakar. Credit: Tarmizy Harva via Reuters)

Eye-witness accounts brought to life by archive. Witness History is for those fascinated by and curious about 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 how the Excel spreadsheet was developed, the creation of cartoon rabbit Miffy and how the sound barrier was broken.

We look at the lives of some of the most famous leaders, artists, scientists and personalities in history, including: the moment Reagan and Gorbachev met in Geneva, Haitian singer Emerante de Pradines’ life and Omar Sharif’s legendary movie entrance in Lawrence of Arabia.

You can learn all about fascinating and surprising stories, like the invention of a stent which has saved lives around the world; the birth of the G7; and the meeting of Maldives’ ministers underwater. We cover everything from World War Two and Cold War stories to Black History Month and our journeys into space.