Devra G. Kleiman, 67, a biologist whose groundbreaking research on giant pandas and South American monkeys showed how zoos can play a crucial role in preserving endangered species, died April 29 at George Washington University Hospital. She had cancer.

In a career spanning more than 40 years, much of it at the National Zoo, Kleiman helped create and define the new field of conservation biology.

She was perhaps best known for spearheading an unprecedented international effort to save golden lion tamarins -- small, reddish-orange monkeys that live in Brazil's Atlantic coastal forests -- from extinction.

Florencio Campomanes, 83, a former president of the World Chess Federation who made a controversial decision in 1985 to suspend the first title match between Garry Kasparov and Anatoly Karpov after it had lasted five months, died Monday of cancer in Baguio City, the Philippines.

At the time, Campomanes was suspected of acting at the behest of the Soviet authorities in order to protect Karpov, the titleholder and the Kremlin's favorite.

In 2005, Campomanes denied there was any Soviet pressure to end the match.

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