monitoring bighearteds 24 hour as day. this work casts a cold and critical eye back at the chinese government. he is probably the most celebrated artiness the word. certainly one of the best known. the stand he has taken politically is very important, and it is linked to the art, but the art is underrated. it is important. it needs to speak for itself in term oz what is happening here. >> the show is a reflection of the artistic achieve enter manies. showing a spotlight on the power of art to challenge the authority. al jazeera at london's royal academy of arts. >> much more on that and everything else that we have been covering on our website aljazeera.com. >> this is "techknow". a show about innovations that can change lives. >> the science of fighting a wildfire. >> we're going to explore the intersection of hardware and humanity, but we're doing it in a unique way. this is a show about science... >> oh! >> oh my god! >> by scientists. >> tonight, techknow investigates shrimp safety. >> seafood by nature is a high risk