July 4, 2025

Science Quiz: Eons, Isotopes and Interstellar Visitors

By Allison Parshall

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.

Allison Parshall is an associate editor at Scientific American covering mind and brain and she writes the weekly online Science Quizzes. As a multimedia journalist, she contributes to Scientific American's podcast Science Quickly. Parshall's work has also appeared in Quanta Magazine and Inverse. She graduated from New York University's Arthur L. Carter Journalism Institute with a master's degree in science, health and environmental reporting. She has a bachelor's degree in psychology from Georgetown University.

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