Chemical Test Quickly Finds Cognitive Damage in Stroke Patients
Testing for three brain chemicals reveals impairment faster than standard neuropsychological exams
Stories by Charlie Quigg
![Bounce a Battery to Learn If It Is Still Good—Really [Video]](/sciam/cache/file/7A278355-464F-4CB5-A343C0F3A6584D2E_small.jpg)
Bounce a Battery to Learn If It Is Still Good—Really [Video]
Scientists prove that depleted AA batteries will bounce higher when you drop them, as inner material loses density
Plastics Change Color—and Back—in Less Than 1 Second
Smart windows and biosensors need the speed of these new polymers
