Why are bees, worldwide, facing extinction? With the tenacity of a man out to solve a world-class mystery, Markus Imhoof investigates this global phenomenon, from California to Switzerland, China, and Australia.
Professor Iain Stewart uncovers the mysterious history of Australia, and shows how Australia's journey as a continent has affected everything from Aboriginal history to modern day mining, and even the evolution of Australia's bizarre wildlife, like the koala.
The air around us is not just empty space; it is an integral part of the chemistry of life. Plants are made from carbon dioxide, nitrogen nourishes the soil and oxygen gives us the energy we need to keep our hearts pumping and our brains alive. But how did we come to understand what air is made of? How did we come to know that this invisible stuff around us contains anything at all?
In the depths of the Black Sea lies a landscape of eternal darkness. With no light and no oxygen in the sea's anoxic layer, no life can survive, except perhaps the ghosts of ancient mariners whose ships foundered thousands of years ago. Because the environment cannot support the organisms that typically feast on organic materials, such as wood and flesh, there is an extraordinary opportunity for preservation, including shipwrecks and the cargos they carried. In the year 2000, on his third trip to the Black Sea, explorer Dr. Robert Ballard discovered a miraculously well-preserved Byzantine shipwreck, but his team could only take pictures. Now, Ballard returns with archaeologist Dr. Bridget Buxton and Dr. Sergiy Voronov of the Ukrainian Department of Underwater Heritage, and uses state-of-the-art technology and a revolutionary $1.5 million robot known as "Hercules" to excavate two shipwrecks for the first time ever, including one of the most pristine ancient vessels ever found. In 2006, Ballard and the team returned to survey the area for more shipwrecks, and last year began excavations on Sinop D, and Chersonesos A, a 10th-century shipwreck found off southern Crimea at a depth of 135 meters. At Chersonesos A, the team excavated the ship's cargo of nearly 200 jars commonly found at Byzantine sites on the shores of the Black Sea, including Chersonesos. The bright orange color of the nearly 1,000-year-old jars was completely preserved, to the team's amazement. From there, the team sailed to the deeper site, Sinop D, which was the focus of the 2007 survey. The team hoped to answer questions about the ship's construction, its cargo, and how the anoxic conditions had affected its preservation. Ballard and his team have only two weeks, so they must work in perfect precision on their hunt for the Ghost Ships of the Black Sea. Ballard calls this site "the greatest museum on Earth," but his team of marine archaeologists has only begun to scratch the surface of the Black Sea's depths.
2007 • Environment
Adventurer and journalist Simon Reeve heads to one of the most spectacular countries in the world - Colombia. For 50 years, Colombia has been in the grip of a brutal civil war that has killed more than 200,000 people and displaced seven million. But in late 2016, a peace deal was signed promising to end the conflict and finally bring peace to the country. In this hour-long documentary for the award-winning This World strand, Simon explores Colombia at a pivotal point in its history. He travels into the jungle and comes face to face with the guerrilla army FARC, which is now promising to lay down arms. In the Pacific coast city of Buenaventura, Simon finds out more about the fearsome right-wing paramilitary gangs who now dominate the cocaine trade. As the FARC abandon the countryside, there is a fear that these groups will only grow in power. Travelling in the countryside, Simon meets the coca farmers who are demanding government support to stop growing coca and stop the flow of money to criminal gangs. With land ownership, poverty and drugs at the heart of Colombia's problems, it is in the countryside that the country's precarious future will be decided.