You may think that a virus is a virus, and they all afflict living things more or less the same. Yet while it is true that viruses attack most everything on Earth, the viruses that do the vexing ...

Biology lectures teach students that when a cell’s replication machinery comes together, DNA polymerase takes off down the double-helix like a car on a highway ...

Following a double-strand DNA break, an enzyme called PARP1 helps hold the two strands together —like superglue— and creates a safe zone for other proteins to come repair the damage. We don’t exactly ...