A common symptom of Lyme disease is a bullseye-shaped rash. However, many other conditions may cause a similar rash, including ringworm, fixed drug reactions, and allergic reactions to insect bites.

Using genetics to identify the origin and the global path of the ubiquitous insect pest, the German cockroach, back to its wild origin could help us develop more effective pesticides to control them.

We generally associate allergies with what’s happening outside — pollen, ragweed, etc. But what about when you’re indoors, windows and doors shut, and you still feel sniffly? If you know it’s not dust ...