TULSA, Okla. — A new fentanyl mixture discovered by the Tulsa Police Department's forensic lab is raising concerns for local nonprofits that help people with addiction. The Tulsa Police Department ...

Students will learn how to categorize matter as either pure substances or mixtures. Students will apply tests, based on physical properties of matter samples, to determine whether a mixture is ...

A printout marked with a series of numbers and colorful zig-zags may look like a foreign language to some people. But to Cristy Kissel, who leads the York County Sheriff’s Office DNA laboratory, those ...

THE art of road-making is rapidly becoming transformed into a science, which possesses a “Road-makers' Library“of its own. The bituminous binding materials are now used after study of their chemical ...