Join our museum’s Gallery Guides for a “drop-in” tour that explores the importance of water and the histories of pollution and protection that have changed our relationship to this vital substance.

Clean water is life, and our scientific understanding of the water cycle’s significance and complexity has grown in the last few centuries.

On this tour, you’ll learn about the gods and powerful beings that were believed to protect flowing waters, how early anti-pollution advocates dealt with crises like thousands of dead fish in the Colorado River, and how chemistry and water knowledge intersect. Find out how Rachel Carson’s Silent Spring, the EPA, and scientists and activists throughout history have fought to protect our waters from contamination.

We’ll also talk about the history of our local water sources in the Delaware Valley, the technological advancements that led to the water systems we have today, and how innovators helped us observe, test, and purify water, first to make it fit for human consumption, and later as a matter of environmental ethics.


Drop-in tours are free and no reservations are necessary.

More events

outdoor photo of Ben Feringa in a shirt and blazer
November 13, 2026
Programs, Lectures & Talks

Ullyot Lecture and Award: Ben Feringa

SOLD OUT! The 2016 Nobel co-laureate in chemistry will present this year’s lecture, “The Art of Building Small,” followed by a Q&A session and award presentation.

red, yellow, and green can of DDT pesticide
November 14, 2026
Free

Science & Activism Tour

From Rachel Carson to ACT UP, explore how scientists and activists have shaped discovery and created change.

Color print advertisement for the Dow Chemical Company depicting a woman buying groceries at a checkout counter with a line of people behind her.
November 14, 2026
For Families

Stories of Science: Feasting on Chemistry

Join us in our museum EVERY SATURDAY for a family-friendly program that highlights strange and surprising stories from the history of science!

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