TV Guide BBC World Service Wednesday

Ivana Davidovic presents this new report in which DNA detectives track down the British soldiers who fathered children in Kenya then disappeared, leaving the children and their mothers without support

In 1875 in the western Pacific, the crew of HMS Challenger discovered the Mariana Trench, which turned out to be deeper than Everest is high, by two kilometres. Trenches like Mariana form when one tectonic plate slips under another and heads down. Globally, there are about 50 of them. While at one time some thought it was too dark and deep for life exist and others wildly imagined monsters, the truth has turned out to be much more surprising. Misha Glenny and guests discuss the life and future of the world's deepest ocean trench

Ivana Davidovic presents this new report in which DNA detectives track down the British soldiers who fathered children in Kenya then disappeared, leaving the children and their mothers without support

In 1875 in the western Pacific, the crew of HMS Challenger discovered the Mariana Trench, which turned out to be deeper than Everest is high, by two kilometres. Trenches like Mariana form when one tectonic plate slips under another and heads down. Globally, there are about 50 of them. While at one time some thought it was too dark and deep for life exist and others wildly imagined monsters, the truth has turned out to be much more surprising. Misha Glenny and guests discuss the life and future of the world's deepest ocean trench