a lot of the medicines we use in our lives, anaesthesia, anti-fungal agents, begin in amphibian skin.e lose keystone species and we lose the ultimate canary in the coal mine. it tells us we've got some serious managing to do. >> jeff, it's been fascinating. you do great work with these creatures and it's a great insight how they operate. "ocean mysteries" airs on abc nationwide. >> "sharks" is the new book. it's the first interactive transmedia book on sharks. >> good to see you. thank you very much. >> i would shake your hand, but i have a toad in it. >> that's fine. thank you. that's all for us tonight. good night. >>> good evening. we begin with breaking news. the signs keep growing that the country is on high alert here and around the world against the possibility of al qaeda attacks. the threat, credible and serious. three sources telling cnn that al qaeda in the arabian peninsula was in the final stages planning for an unspecified operation. the response so far, 21 embassies scheduled to close on sunday. the state department issuing a global alert for the month of august, to ame

a lot of the medicines we use in our lives, anaesthesia, anti-fungal agents, begin in amphibian skin.one species and we lose the ultimate canary in the coal mine. it tells us we've got some serious managing to do. >> jeff, it's been fascinating. you do great work with these creatures and it's a great insight how they operate. "ocean mysteries" airs on abc nationwide. >> "sharks" is the new book. it's the first interactive transmedia book on sharks. >> good to see you. thank you very much. >> i would shake your hand, but i have a toad in it. >> that's fine. thank you. that's all for us tonight. good night. >>> good evening. we begin with breaking news. the signs keep growing that the country is on high alert here and around the world against the possibility of al qaeda attacks. the threat, credible and serious. three sources telling cnn that al qaeda in the arabian peninsula was in the final stages planning for an unspecified operation. the response so far, 21 embassies scheduled to close on sunday. the state department issuing a global alert for the month of august, to americans trave