When I take aspirin for a headache, how does the pill know that it’s my head that hurts and that it should go there and not to my foot? — Melissa, El Cajon Dear Matthew …
August 18, 1994
Posted August 18, 1994
When I take aspirin for a headache, how does the pill know that it’s my head that hurts and that it should go there and not to my foot? — Melissa, El Cajon Dear Matthew …