Scientists have uncovered a 4,000-year-old ancestor of the Black Death in the remains of a Bronze Age sheep, shedding light ...

Researchers thought the bacterium would infect fleas on rats, and when the rats died, the fleas would jump to humans, infecting them. Rats are also thought to be responsible for spreading more recent ...

Fleas tend to be carried into homes by pets, and from here they can move on to humans, where their bites leave behind small itchy red bumps, often in clusters on arms and ankles. If you suspect ...

Thankfully, these fleas are not harmful to humans or pets. They do not bite and only feed on decaying plant material and bacteria in the soil. With the warmth, you might not see them for too much ...