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Decades ago, Apollo astronauts gathered hundreds of pounds of lunar rocks and dirt. Last year, NASA loaned scientists at the University of Florida some of the soil, and they sprouted seedlings.

A messy divorce threatens to overshadow Terry McMillan's latest book tour. The best-selling author discusses The Interruption of Everything and revelations about her personal life which emerged during its writing.

In Genius Factory, author and Slate columnist David Plotz traces the history of a so-called "Nobel Prize" sperm bank. Plotz tells Jennifer Ludden of his quest to find the bank's "genius" donors — most weren't what they were represented to be — and their offspring.

Scientists say they've developed a SARS vaccine that can be ingested. The new plan involves modifying tomatoes (and tobacco) so that an inactive form of the SARS virus grows in the plant. When mice ate the tomatoes, they were protected against SARS.

Roughly 8 percent of the 741,000 Mexicans caught entering the United States each year give up trying to enter, according to a new study. Wayne Cornelius, the director of the UC San Diego Center for Comparative Immigration Studies, discusses the study by the Pew Hispanic Center on unauthorized migrants in the United States.

After months of squabbling, the House Ethics Committee finally agrees to meet. But the partisan standoff over Majority Leader Tom DeLay may continue, as the Republican committee chairman insists that his top aide run the committee staff; Democrats say the move violates panel rules.

What are the legal ramifications of racial and religious profiling to combat terrorism? Scott Simon asks two experts. Richard Jerome oversaw the civil rights division -- and police accountability -- while at the Justice Dept. Paul Rosenzweig, a former federal prosecutor, is a senior research fellow at the Heritage Foundation.

NARAL Pro-Choice America is withdrawing its TV ad that harshly criticized Supreme Court nominee John Roberts. Even fellow abortion-rights allies complained the ad was unfair.

A deal announced last week arranges for the Palestinian Authority to purchase and run greenhouses from Israeli settlers in the Gaza Strip, allowing the multimillion-dollar agricultural business to continue after the planned Israeli pullout from settlements begins later this week. Liane Hansen speaks with Steven Cohen of the Israel Policy Forum.

The Fire Department of New York releases oral histories and audio from Sept. 11, 2001. Crowded radio frequencies may explain in part why firefighters stayed in the north tower of the World Trade Center 29 minutes after the south tower fell.