But his first public display later this year is at the heart of a growing storm - one pitting scientists against Kenya's powerful and popular evangelical Christian movement. The debate over evolution vs. creationism - once largely confined to the United States - has arrived in a country known as the cradle of mankind.

"I did not evolve from Turkana Boy or anything like it," says Bishop Boniface Adoyo, head of Kenya's 35 evangelical denominations, which he claims have 10 million followers. "These sorts of silly views are killing our faith."

He's calling on his flock to boycott the exhibition and has demanded the museum relegate the fossil collection to a back room - along with some kind of notice saying evolution is not a fact but merely one of a number of theories.

Leakey fears the ideological spat may provoke an attack on the priceless collection, one largely found during the 1920s by his paleontologist parents, Louis and Mary Leakey, who passed their fossil-hunting traditions on to him.

The museum, which attracts around 100,000 visitors a year, is taking no chances.

Turkana Boy will be displayed in a private room, with limited access and behind a glass screen with 24-hour closed-circuit TV. Security guards will be at the entrance.

"There are issues about the security," said Dr. Emma Mbua, the head of paleontology at the museum. "These fossils are irreplaceable and we wouldn't want anything to happen to them."