Ancient DNA data shed light on the past 4000 years of Southeast Asian genetic history.
Native American population history is reexamined using a large data set of pre-Columbian mitochondrial genomes.
Bacteria engineered to use nonstandard amino acids show increased resistance to bacteriophage attack.
A close-up look provides clues to the relationships between modern humans, Denisovans, and Neandertals.
Neanderthals carried a variant of a skin cell receptor similar to that in modern Europeans, suggesting that their pigmentation may have been similarly variable.
Reliable DNA sequences were obtained from 40,000-year-old cave bear fossils by screening for contaminants using existing sequences and by comparisons with modern dog and bear genomes.