than 100 years after it sank, the titanic still holds a fascination for scientists, explorers and interests. the first ever tour to the wreckage was by the titan many sub in july the wreckage was by the titan many sub injuly 2021. there have been several trips since, but this latest voyage is the first to have gone so wrong, and there are several factors that are making it so hard to find. the first is the ragged nature of the ocean floor, which might mean the ocean floor, which might mean the submarine is hidden in a canyon. it s my wreck on the ocean then is unmanned. second is the depth of water, and currents might have made the submarine draught. the third is the submarine draught. the third is the pressure at that depth may mean other detection equipment cannot find it or get down that far. the roblem find it or get down that far. the problem for find it or get down that far. the problem for the find it or get down that far. the problem for the search team is that ti
both planets are actually a comparable shade of greenish blue. well, to help us understand this, i mjoined by professor catherine heymans. she s the astronomer royal for scotland, and a professor of astrophysics at the university of edinburgh. hello to you. thank you very much forjoining us. hello to you. thank you very much forjoining m hello to you. thank you very much forjoining ve for “oining us. please explain, why did forjoining us. please explain, why did we think forjoining us. please explain, why did we think they forjoining us. please explain, why did we think they were forjoining us. please explain, why did we think they were these - did we think they were these different colours to begin with? these images that we are used to seeing are from the voyager two nation. it was a nasa spacecraft that was launched in the late 70s and took images of uranus and neptune in the late 80s by the time it got there. now, the way you and i see colour is we have photo re
eurovision song contest. the uk s entry will be the last of the 26 acts to perform. now on bbc news, it s time for click. this week, we have a mix of medical marvels. go gently, it can feel that! how e skin could give robots a sense of touch. so, just lean forward ever so slightly. whoa! that s good. keep going. the machines are going off road. we ride the wheelchair that can help you through a rocky patch. and on another note, a final note to blow your mind. yeah, we re with the rock singer who s got his voice back. that s a lot of air! the royal college of physicians is the oldest medical college in england. there s a skull eating his hand. oh, wow. yeah, henry viii founded the place in 1518 and since then, 122 presidents have overseen enormous changes in our understanding of the human body, its ailments and their treatments. in the garden, a reminder of the plants that used to be all we had to treat everything, and which formed the basis of many modern remedies. and in the
to decide if recep tayyip erdogan remains president, after 20 years in power. president erdogan faces a tough challenge from his main opponent, kemal kilicdaroglu who leads a six party coalition. now on bbc news, it s time for click. a final note to blow your mind. we are with a final note to blow your mind. - are with the rock singer who has got his voice back. that are with the rock singer who has got his voice back. his voice back. that is a lot of air! in the garden, a reminder of the plants that used to be all we had to treat everything. and which formed the basis of many modern remedies. in the garden, a reminder of the plants that used to be all we had to treat everything. and which formed the basis of many modern remedies. its members witness the first use of ultrasound in obstetrics. in the 19905, ultrasound in obstetrics. in the 1990s, the first robotic surgery, followed by the world s first robotic hand. the college has 40,000 members around the world, practisin