Sometimes words are enough to reveal to us how a scientific concept works, but often nothing beats a good demonstration to really make the idea behind the concept snap into place. So tell us about the best scientific demonstrations you've ever seen!

Maybe it was a lab experiment designed to show you the power of a reaction or a DIY scientific experiment you tried at home; maybe it was seeing the geological concepts you've read about actually acting in nature; maybe it was an exhibit, visualization or illustration that someone put together to explain a tricky comparison; or maybe it was even an accidental demonstration of a scientific concept that caught you when you were least expecting it. Tell us about it — along with any videos or pictures — in the comments now.


Image: Neal Herbert / NPS from Arches National Park, an excellent place to get a demonstration of the power of erosion.