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NPR's Joe Palca reports that scientists have found evidence that competition between the sexes could have a basis in evolution. Studies of fruit flies being released today found that successive generations of males evolved superior ability to pass on their genes. But it came at the expense of females -- the male fruit flies' sperm became toxic.

is likely to affect Israel's Labor Party, which had been in power four years.

NPR's Eric Weiner reports on Israeli prime minister-elect Benjamin Netanyahu's first speech to the Israeli people. Netanyahu narrowly defeated incumbant Shimon Peres to become the nation's youngest-ever head of government. In his speech Netanyahu commited his government to continuing the peace process with the Palestinians and Arab neighbors.

Don Vitale (vih-TAHL) of U-S Assist discusses his work with host iane Hansen. U-S Assist provides clients everything from medical evacuations verseas to bizarre requests like elephant rides at a high school prom.

Storyteller Kevin Kling has a hitchhiking tale to tell. He gets picked up by Otto a man with bad knees and a few other problems.

Edmund Roy reports on the uncertainty facing India's political future. The split vote suggest that Indians are being more independent in their choice of candidates, but this has led to a hung parliament and the possibility of a new election in six months.

Muslims all over the world are celebrating the Feast of Sacrifice today, marking the end of the yearly pilgrimage to Mecca in Saudi Arabia. There are several rituals performed during the pilgrimage and to better understand them we asked three Americans who practice Islam to reflect on their experiences.

Liane Hansen speaks with Al Roker, meteorologist and NBC weatherman bout the weather and its importance in our lives. Roker narrates a four-part eries on the weather titled "Savage Skies," which begins this week on many PBS elevision stations.

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NPR's Vicky Que reports that a new study is raising questions about whether certain hormone-based contraceptives may increase the risks of becoming infected with the AIDS virus. In the study, researchers found that monkeys that received the hormone progesterone were more likely to be infected with SIV, the monkey equivament of HIV, than monkeys that did not receive the hormone. The findings suggest that contraceptives like Norplant may not only NOT protect against HIV, but may actually enhance a woman's chances of becoming infected. Researchers cautioned, however, that more research is needed to determine whether the findings hold true for humans.