Add Yahoo as a preferred source to see more of our stories on Google. From its place on local meeting agendas to being targeted by Cabinet officials, fluoride has been under the microscope again. In ...

Explore beach water under the microscope and discover how much life it contains.

See what’s hiding in a glass of bedside water under the microscope.

Fluoridated drinking water has come under fire in recent days, targeted by local activists and Cabinet member Robert F. Kennedy Jr. Medical consensus says fluoride is harmless at levels found in ...