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Researchers at Smithsonian's Conservation Biology Institute in Front Royal, Va., are using an unusual method to raise baby cheetahs: cross-fostering. That means that even though they're not siblings, the baby cheetahs are being raised by the same mother. The scientists are researching cheetahs in captivity so they can save the wild species.

The president's special envoy for Afghanistan and Pakistan died Monday at 69, days after suffering a tear in his aorta. He held many diplomatic and foreign policy positions over the years and, in 1995, negotiated an end to the Bosnian War.

Most Americans have looked for health information on the Web. But some "super-users" have used the Web to find others with rare diseases, connect with researchers — and even find new treatments.

The estate tax hits a tiny fraction of the wealthiest Americans, but it generates debate among a much larger segment of the population. And this year could be no exception, though it's the first and probably only year with no federal estate taxes on the books.

Documentary About the Barnes Collection

This year, Hoover Dam celebrated its 75th anniversary. The giant dam near Las Vegas stores Colorado River water for much of the Southwestern U.S.

ANALYSIS: The deal suggests President Obama may be betting that he can spend the next two years running against popular distaste for both major political parties. That's what President Clinton did on his way to reelection.

The Democratic-led Senate has pushed through the largest rewrite of financial regulations since the aftermath of the Great Depression. But some Republicans and liberal Democrats say the bill, which must be reconciled with a similar House measure, falls short of its goal.

As more women postpone motherhood, they're hitting that age-old constraint: the biological clock. Now, technology is dangling the possibility that women can stop that clock, at least for a while. As one doctor put it, freezing eggs offers the biggest game changer since the birth control pill.

Airs Tuesday, June 8, 2010 at 8 p.m. on KPBS TV