In a way, sequencing DNA is very simple: There's a molecule, you look at it, and you write down what you find. You'd think it would be easy—and, for any one letter in the sequence, it is. The problem ...

Fragments of DNA from long-extinct human relatives still circulate in modern genomes, and in some cases they do more than ...

Stay up to date on the latest science with Brush Up Summaries. Article reviewed by Ninning Liu, PhD from the Wyss Institute at Harvard University. Similar to retail stores that use standardized ...