When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. DNA tests can tell people where in the world their ancestors came from, and if they're at risk of ...

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 ...

Cancer genomes are the result of diverse mutation processes that have often accumulated over decades. Scientists have analyzed the molecular evolution of tumors after exposure to mutagenic chemicals.