Learn about how chemotherapy drugs work to fight cancer.
Household drugs like painkillers, antibiotics and hormones enter the water system in many ways. For example, some animal feeds contain antibiotics and might flood into rivers with run-off, while other antibiotics are flushed or dumped down sinks and toilets in homes.
Before modern antibiotics, doctors sometimes relied on an unusual, but effective therapy for keeping wounds from getting infected. Yep, you guessed it: maggots.