. >> one turn, 10 microlitres. basically 10 drones worth. the goal is to have - i want gentle productive bee, but bees resistent to pests and problems we have, which is a tall order. i'll spend the rest of my life trying to do that. >> koby is not alone. in paulman washington, members of her team are breeding the >> >> what are these? >> voucher specimens. this is egypt collected in 1998, and bees from australia. >> for years they've gathered diverse stocks of bee sperm from italy, turkey and the kauk cos mountains to build diversity. >> this is the isolated mating station. we use it to control the mating of the bees. the colonies that have the males that we want for the mating. we have virgin queens that have been produced from crosses that we made during the frozen semen. >> a remarkable aspect fence on smn. work. >> this is the first sperm bank. it has to be frozen for future use. >> it's an extreme environment for the cells to be put through. >> after it's gathered in the storing tubes, the temperatures is lowered very slowly. these scie