National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

DNA sequencing is any chemical, enzymatic or technological procedure for determining the linear order of nucleotide bases in DNA. Sanger sequencing by replicative synthesis in the presence of dideoxy ...

Genetic engineering is the act of modifying the genetic makeup of an organism. Modifications can be generated by methods such as gene targeting, nuclear transplantation, transfection of synthetic ...