From atoms to zinc, each question in this quiz will test your knowledge of biology, chemistry, physics, and more. See if you ...

The search for life beyond Earth is one of the most profound quests in human history. It began not in laboratories, but in ...

Test your science knowledge with this weekly news quiz! We’d love to hear from you! E-mail us at [email protected] to share your experience.

Visual: In this diagram, J, S, U, and N are the solar system’s giant planets. What’s the collective name for the objects in ...

During glycolysis, cells make energy by breaking down glucose step by step. One compound gives its phosphate group directly to ADP to form ATP in this process, which is the cell’s energy source. Which ...

The human skeleton — our internal framework that includes bones and cartilage — evolved over millions of years. It comprises an axial skeleton, which consists of the skull and the spine, as well as an ...