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PhET provides fun, interactive, research-based simulations of physical phenomena for free. We believe that our research-based approach- incorporating findings from prior research and our own testing- enables students to make connections between real-life phenomena and the underlying science, deepening their understanding and appreciation of the physical world.

This site promotes a researched level of inquiry and questioning.

Glean Comparison Search helps people compare search results for different opinions to reduce confirmation bias.

The represents a new approach to understanding the internal structure of biological cells. Using advanced computer imaging techniques, real cells may be reconstructed in 3D from physical measurements. The computer reconstructions created through the Cell Visualization Project will permit cells to be explored interactively for education and research.