The Mind


Video: How Much Does a Thought “Weigh”?

Anywhere information goes — even into your brain — energy goes with it. 

Bottle up that energy and it has mass, and hence weight.

So, how much does one of your thoughts weigh?  

     a.) As much as an electron? 

     b.) As much as a water molecule? 

     c.) As much as a mosquito?

Watch this video from “What The Physics?!” for the answer.

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Greg Kestin

    Greg Kestin holds a faculty position at Harvard University, where he conducts theoretical physics research, teaches, and produces educational online content. He earned his physics Ph.D. from Harvard, as a member of The Center for the Fundamental Laws of Nature, focusing on theoretical particle physics and quantum field theory. Over his career, he has also conducted research in nuclear physics, fusion energy, and gravitational wave physics. For over a decade he has been involved with innovative educational outreach endeavors, bringing science to both students and members of the public through his writings, videos, lectures, and multimedia.

    Samia Bouzid

    Samia Bouzid is a multimedia storyteller with a passion for science, especially physics. She is a production assistant for NOVA’s YouTube series “What the Physics?!”