NOVA scienceNOW is a fast-paced science series that provides viewers with the inside track on the powerful intersection between the universe of scientific innovation and the everyday world, revealing the spirit of intellectual adventure that drives breakthrough research and the science behind the headlines. Hosted by noted astrophysicist Neil deGrasse Tyson of the Hayden Planetarium, this NOVA scienceNOW program covers:

Dino Blood: All we know about dinosaurs comes from fossils. Thanks to paleobiologist Mary Schweitzer, these old bones are telling us more than ever. Most experts thought that it was fruitless to search for preserved soft tissues in dinosaur remains, but Schweitzer has found evidence of delicate structures such as blood vessels and red blood cells that miraculously have survived for millions of years.

Epigenetics: Our diets and lifestyles can literally change the expression of our genes by influencing a vast network of chemical switches inside our cells called collectively the epigenome. Learn what this new understanding may mean for the future of medicine, as many diseases now appear to stem from errors in the epigenome--errors which are easier to correct than genetic ones.

Kryptos: The most mysterious of all codes in the most clandestine of all places has yet to be fully broken. "Kryptos," a coded sculpture in the courtyard of CIA headquarters, contains a long string of letters that conceal a message devised by sculptor James Sanborn. Uncover his cipher techniques and discover the past successes of reading portions of the text. But the beguiling last bit of the message remains a mystery.

Profile: Arlie Petters: Meet cosmologist Arlie Petters, Professor of Mathematics and Physics at Duke University. His hard work and persistence transformed him from a poor kid from Belize into one of the world's premier researchers in the field of gravitational lensing. Learn how, throughout his amazing career, he has never forgotten his humble origins, and how he continues to help and inspire those back home.