In a study published in Optics Express, a research group led by Prof. Fu Yuxi from Xi'an Institute of Optics and Precision ...

Atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...

Tavares Republican state senator Keith Truenow filed a bill that would ban fluoride in public water systems across the state.The bill, which looks to address a number of agricultural issues, will also ...

From being targeted at town meetings and by Cabinet officials, fluoride is under the microscope. Why is it controversial, and ...