Was the searing summer of 1988 a taste of things to come? NOVA looks at the greenhouse effect, which portends higher temperatures, rising sea levels and other environmental disasters.

NOVA looks at the bongo-playing scientist, adventurer, safecracker and yarn-spinner Richard Feynman, most recently famous for his role as gadfly of the Presidential Commission investigating the explosion of the space shuttle Challenger.

NOVA explains "chaos," a new science that is making surprising sense out of chaotic phenomena in nature, from the weather to brain waves.

NOVA goes to the Soviet Union for an inside investigation of the world's most catastrophic nuclear power accident with correspondent Bill Kurtis.

In an Idaho classroom, teacher Phil Gerrish puts an unorthodox interpretation on the day's biology lesson. As students take notes, he explains that creationism is a valid scientific explanation for the origin on life. Once relying solely on the literal word of the Bible to make their case, creationists now argue that the scientific evidence is on their side. NOVA reports on this new twist in the long-running battle between creationism and evolution.

NOVA explores the importance of the Gulf Stream to ocean life, climate and human history.

In this two-part series, NOVA investigates the mystery of Easter Island in the South Pacific. Who built its celebrated statues and why?

In the second part of this two-part series, NOVA explores ancient legends hold the clues to the violent history of the South Pacific's Easter Island.

Scientific detectives test their ingenuity in the effort to find underground oil deposits.

Arlo, Nancy and Janice each have a 50/50 chance of developing a devastating nerve disorder. A laboratory test can tell them if in fact they will fall victim. In their shoes, would you take the test? Thousands of others face a similar choice: to know, or not know, if they will carry the genetic time bomb of Huntington's disease. NOVA looks at this incurable disease which affects 20,000 people in the US and threatens tens of thousands of others.

Four of the major systems forming the infrastructure of an urban center are examined. Judd Hirsch narrates as Nova looks at the distribution and disposal of electricity, water, sewage and garbage in New York City.

The Controversial Dr. Koop is an episode from the PBS documentary series NOVA that aired on October 10, 1989. The episode features C. Everett Koop, the former Surgeon General of the United States, who rattled the country with his distinct views on AIDS, tobacco, and abortion while in his position from 1982 to 1989

NOVA examines the entries put forward by five architects and their teams, in a tough competition to choose a design for the new Chicago Public Library. The show gives viewers a chance to see the variation between the designs, as well as taking a closer look at the winning plan.

Echoes of War is a 1989 episode from the PBS science series NOVA. World War II may have ended with the atomic bomb, but it was the radar which provided the key to winning the battles leading to Hiroshima. The NOVA team recounts the importance and history of the radar in modern warfare.

Biologists around the world gear up to decode the three-billion-letter genetic message that describes how humans are made. Ethicists warn that it may not be such a good idea.

Hurricane! from the show NOVA takes the viewer inside the violent, cyclonic storms that can reach speeds of 72 miles per hour and threaten coastal areas throughout the North Atlantic region. This 1989 episode demonstrates how scientists are studying these killer storms and gathering data in hopes of better predicting their paths

In 1966, the city of Venice faced the beginnings of a large-scale crisis when the main square began to sink underwater. Since then, the government has been trying to find a solution to this potentially devastating problem. In 1989, a team from NOVA traveled to the city to explore the possible answers, as well as the possible challenges.

Humans have traditionally enjoyed a complex relationship with music. Originally aired in 1989, this NOVA episode takes a closer look at the science behind the everyday phenomenon that affects so many lives. Scientists explore the human brain's ability to perceive music. Researchers also examine the impact of various instruments, from classic violins to human voices

In 1988, Yellowstone National Park became the site of raging forest fires. The park officials did not step in to quell the blaze, instead adopting the policy that the park would recover from the devastation naturally. The NOVA team heads to Yellowstone soon after the fires to examine the impact of the blaze on the local ecology.

The Schoolboys Who Cracked the Soviet Secret recreates the story of a British schoolteacher and his students who discovered secrets of the Soviet space program. In the 1960s, Geoffrey Perry at the Kettering Grammar School gave his students used short wave radios for a science project, but the school project had international reach when the group connected with Soviet transmissions.