The 'Car Talk' brothers, Tom and Ray Magliozzi, visit the UC Davis lab of Andy Frank, inventor of the plug-in hybrid, to learn more about one of the possible ways we can transition our transportation system of off oil. Watch NOVA every Tuesday night on PBS. Or join us online at http://www.pbs.org/nova Funding for NOVA is provided by ExxonMobil, David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. To learn more, visit http://www.pbs.org/nova/car

FRONTLINE/World's Joe Rubin gets reaction from Bosnia on Karadzic's arrest, and hears from a journalist in Belgrade, Serbia, who thinks another wanted war criminal's arrest is soon to follow.

Garden correspondent Paul Epsom answers a viewer's question about the health of her weeping birch tree.

Physicists can't see it and don't know much about what it is, but dark energy makes up 70 percent of the universe. Meet one of the country's leading scientists trying to understand dark energy and the role it plays in causing our universe to expand.

We all rely on the water cycle, but how does it really work? Scientists at UC Berkeley are embarking on a new project to understand how global warming is affecting our fresh water supply. And they're doing it by tracking individual raindrops in Mendocino and north of Lake Tahoe.

Join QUEST in our latest photography feature about viewers like you who love documenting science, environment and nature imagery here in the Bay Area. This week, meet Erin Malone, who makes beautiful, impressionistic images in a place that many overlook or see as ugly-- the subtly hued mud and marsh of South San Francisco Bay.

Reporter Alexis Bloom investigates the unlikely animals who save lives by sniffing for land mines.

Neil deGrasse Tyson embarks on a quest with leech expert Mark Siddall in the swamps of Connecticut to seek out the infamous decorated leech. Don't miss the new episode of NOVA scienceNOW, airing Wednesday, July 23 at 9pm on PBS. Watch past episodes of the program, try out interactives, and more on our Web site: http://www.pbs.org/nova/sciencenow Video podcast produced and edited by Melissa Salpietra. Original footage and interviews for NOVA scienceNOW produced by Julia Cort. NOVA is produced by WGBH in Boston. Funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, the Corporation for Public Broadcasting, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0407101. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

BILL MOYERS JOURNAL travels to ground zero of the mortgage meltdown—Cleveland, Ohio. Correspondent Rick Karr takes viewers to Slavic Village, one of the hardest hit neighborhoods in the nation when it comes to the spate of foreclosures caused by the subprime mortgage crisis. There, more than 1,000 homes stand vacant and decaying in a neighborhood that once thrived with families living the American dream of home ownership.

Moyers gets perspective from veteran journalist William Greider on the current financial crisis and what he calls "the great deflation of Wall Street."

Bill Moyers gives a preview of next week's show and asks for participation in the Deepening the American Dream Project.

Jill Tartar, director of the SETI Institute, has thought long and hard about what we could, should, and would say to an alien civilization. Don't miss the new season of NOVA scienceNOW, airing every Wednesday this summer. Watch past episodes of the program, try out interactives, and more on our Web site: http://www.pbs.org/nova/sciencenow Video podcast edited and narrated by Melissa Salpietra. Original footage and interviews produced by Josh Rosen for NOVA. Stock footage: Morgan Lane Photography/istockphoto.com, David Baumber/istockphoto.com, Paul Rogers/istockphoto.com, NASA NOVA is produced by WGBH in Boston. Funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, the Corporation for Public Broadcasting, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0407101. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

FRONTLINE/World correspondent Stephen Gray investigates one of the darkest sides of the Bush administration's war on terror -- it's secret rendition program.

Host Jamie Durie discusses maintenance of this popular indoor plant.

In the wild, mating is anything but tender. Watch how one shark couple's attempt at mating leads to another shark's dinner.

Are we in danger of running out of water? California's population is growing by 600,000 people a year, but much of the state receives as much annual rainfall as Morocco. With fish populations crashing, global warming, and the demands of the country's largest agricultural industry, the pressures on our water supply are increasing.

FRONTLINE/World reporter Marjorie McAfee travels to Niassa, Mozambique, to meet Feliciano dos Santos, an Afro-pop bandleader by night and a non-profit hygiene and sanitation advocate by day.

Conservatives Mickey Edwards and Ross Douthat discuss why they believe their movement has gone off track during the last eight years and what it means for the Republican Party. Douthat is senior editor at The Atlantic Monthly and co-author of Grand New Party, and Mickey Edwards is a former Republican Congressman and author of Reclaiming Conservatism.

Bill Moyers introduces "Deepening the American Dream," a Web-only project at www.pbs.org/moyers that features essays and videos of some of Moyers' notable guests laying out their vision for the future of the American dream.

Conservatives Mickey Edwards and Ross Douthat discuss why they believe their movement has gone off track during the last eight years and what it means for the Republican Party. Douthat is senior editor at The Atlantic Monthly and co-author of Grand New Party, and Mickey Edwards is a former Republican Congressman and author of Reclaiming Conservatism.

FRONTLINE/World correspondent David Montero investigates a mysterious Taliban cleric who has been waging a war in Pakistan's beautiful Swat Valley, all while President Pervez Musharraf has been preoccupied with retaining power.

Garden correspondent Paul Epsom answers a viewer’s question about hypertufa (faux stone) containers.

FRONTLINE/World correspondent Sam Kiley reports from the frontlines of Afghanistan, where dual battles are being fought to win the trust of the Afghan people and combat the extremists living among them.

Host Jamie Durie answers a viewer's question about the use of botanical names in Latin.

Hubble veteran, Mike Massimino, tells it like it is-the good and bad of being an astronaut. Don't miss the new season of NOVA scienceNOW, airing every Wednesday this summer. Watch past episodes of the program, try out interactives, and more on our Web site: http://www.pbs.org/nova/sciencenow Video podcast produced and narrated by Melissa Salpietra. Original footage produced by Rushmore DeNooyer for NOVA scienceNOW. Archival footage and animation courtesy NASA. NOVA is produced by WGBH in Boston. Funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, the Corporation for Public Broadcasting, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0407101. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.

Injury rates reported at America's poultry plants have dropped dramatically in recent years, and so have workplace safety inspections. Are regulators rewarding companies for inaccurate reporting of injuries? Bill Moyers Journal and Expose: America's Investigative Reports go inside America's poultry industry, which employs almost a quarter million workers nationwide, to show the reality of working conditions and to investigate how official statistics showing a drop in workplace injuries may have been the result of deceptive reporting.

Bill Moyers interviews Senator Barbara Boxer about global warming.

A Bill Moyers essay.

Host Jamie Durie answers a viewer's question about what his own garden looks like at home.