"...an international team of a dozen researchers...are here to study the ecosystem that was left behind after the 1986 accident.
"They come here to find out what the impacts are of a nuclear accident on the life that is left behind.
"The team's latest studies on birds suggest that the contamination is linked to some unusual genetic effects.
"One member of the team, biologist Gier Rudolfsen from the Norwegian Radiation Protection Authority, has been focusing on how the male birds' reproductive organs might be affected.
"The constant unzipping and replication of DNA required to produce millions of sperm cells each day means there are many opportunities for the biological assembly line to be broken." See BBC Nature for more detail and videos.