Dino Blood?: A paleobiologist has discovered preserved blood vessels and red blood cells in a 68-million-year-old dinosaur bone.
Epigenetics: It seems that diet and lifestyle actually change the expression of our genes.
Kryptos: A sculpture called Kryptos in the courtyard of CIA headquarters, contains a code that has yet to be fully broken.
Profile: Arlie Petters: A look at Duke University Professor of Mathematics and Physics, and his research in the field of gravitational lensing.moreless
Asteroid: The Apophis asteroid, the size of a football stadium, is headed towards Earth and should arrive in 2036.
Island of Stability: The long road to creating element 114.
Obesity: The biology of eating.
Profile: Karl Iagnemma: A look at MIT roboticist and fiction writer Karl Iagnemma.
Sleep: Why do we need sleep? Exploration of sleep in the role of all animals to strengthen memories (originally aired July 10, 2007)
First Primates: Our most distant primate ancestors, which took the stage shortly after the dinosurs were gone, were tree dwellers the size of mice (originally aired July 9, 2008)
Earthquakes: 3 massive earthquakes struck American Midwest in early 19th century. Will it happen again?
Profile: Sang-Mook Lee: A South Korean professor of geophysics, paralyzed from the neck down from an accident, defies disabled stereotypes.moreless
Personal DNA Testing: Several companies are now offering genetic testing to assess your risk of contracting a variety of serious illnesses.
Art Authentication: Computer algorithms are now helping to identify a fake from an original painting.
Capturing Carbon: An eighth grader's science fair project inspired her scientist father to develop a new way of sequestering atmospheric carbon dioxide.
Profile: Pardis Sabeti: A look at rocker and Harvard University geneticist and her efforts at tracing the evolution of the human genome.moreless
Dark Matter: Scientists are looking for the hypothetical substance of the universe from an abandoned mine half-mile underground.
Of Mice and Memory: New insights on mice memory loss and recovery may benefit Alzheimer research.
Profile: Hany Farid: A look at the Dartmouth College professor of computer science, and the computer program he developed to discover if a photograph has been faked
Wisdom of the Crowds: The combined estimates of a group of people yield a median amazingly close to the right answer.moreless
Mass Extinction: What caused the greatest mass extinction nearly 250 million years ago?
1918 Flu: The 1918 flu virus is revived and decoded in the hopes that we can learn from it before the next pandemic.
Profile: Cynthia Breazeal: A look at MIT social roboticist Cynthia Breazeal.
Papyrus: Can we use space-age technology to read papyri fragments that are almost 2,000 years old?moreless
Aging: A look at recent research on the aging process, and how we might slow it down.
Space Elevator: The possible creation of a "space elevator" made from nanotubes, and a NASA contest designed to fuel innovation behind this idea.
Maya: The use of a new NASA satellite technique to find lost Maya ruins.
Profile: Bonnie Bassler: A look at Princeton molecular biologist Bonnie Bassler and her research on bacteria communication.moreless
Sleep: Sleep may play an important role in strengthening memories.
CERN: The Large Hadron Collider (LHC) nears completion at the international particle physics lab in Geneva, Switzerland.
Emergence: Scientists try to understand a phenomenon called emergence, which allows a flock of birds or a school of fish to maintain such impressive order.
Profile: Julie Schablitsky: A profile of University of Oregon archaeologist Julie Schablitsky, whose research is helping to rewrite the history of the Old West.moreless