The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

Stool samples can help doctors diagnose some health conditions. Tips for collecting a stool sample include urinating before collecting the sample and using any tools that the sample kit provides.

A groundbreaking study has found that evolution is not as unpredictable as previously thought, which could allow scientists to explore which genes could be useful to tackle real-world issues such as ...

Survey researchers increasingly recognize that a single survey of the general public can rarely represent the views of small groups of Americans. Such surveys frequently have too few interviews with ...

Training is an important tool to achieve and maintain the required competence of personnel working in nuclear facilities. Effective training and qualification of personnel are necessary for the ...

Black Americans constitute a population that is multicultural, regionally distinctive and often underrepresented in surveys. While most national public opinion surveys allow researchers to study ...

Civil rights leaders and advocates are demanding an end to systemic racism, a reference to the systems in place that create and maintain racial inequality in nearly every facet of life for people of ...

[This story originally aired on Feb. 23. It was updated on June 15.] Six years ago, someone savagely stabbed to death Chip Northup, 87, and Claudia Maupin, 76, as they slept inside their Davis, ...

Yates' end corrections method in systematic sampling eliminates a linear trend as a component of the mean square error of the estimate of the finite population mean ...