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I got this photo during our visit to White Sands, and used the sound of the thunder with the Flash/Bang method to determine that the bolt was about two miles away. How does lightning produce thunder?
When we first came to Johnson Canyon, we did not have any cell phone service or internet. I could still check email by climbing to the top of the bluff. Why does being higher let me get a signal for the internet?
I took this photo during a boat ride on the Colorado River. I liked the way the canyon walls reflected in the water near the boat's wake. Since the water was crystal clear, why do you see the reflection of the canyon, instead of seeing through to the bottom of the river?
This experiment is one that sounds strange, but it actually is very simple. You can broadcast radio waves with your socks. You can also broadcast with your shirt, a pair of pants, or a wool sweater, but socks work very nicely, and it sounds more unusual.
This is a science demonstration that is often used as a magic trick, to make a coin suddenly appear. It is a very easy trick. All you have to do is change the speed of light.
