Welcome back to another general science quiz! This 28-question challenge pulls from physics, biology, chemistry, and Earth science to test both your memory and your reasoning skills. Some questions ...

From the inner workings of a human body to fascinating concepts of chemical processes, ecosystems, and outer space, these ...

Test your science knowledge with this weekly news quiz! We’d love to hear from you! E-mail us at games@sciam.com to share your experience.

Which of the earth's three layers is the hottest? What does a light-year measure? Who developed the polio vaccine? A just-released survey from the Pew Research Center finds Americans' grasp of common ...