HealthThe brain may flush out its waste products after a mental workout A fluid-filled network that clears waste products from the brain may be important in neurological conditions, but we know little about how it works News
HealthMassive tick-killing effort fails to reduce Lyme disease cases Killing ticks in an area reduces the number carrying the main bacterium that causes Lyme disease, but a large study found it does not lead to fewer reports of people getting sick News