I grew up in the woods. One spring, my cousins and I had an interesting adventure. We went for a walk. We looked at the trees. And the rocks. And the leaves coming out. We looked at the tunnels bugs made under the bark. And we got EPICALLY LOST. We got in DEEP POOP. Don't kill the curiosity-- just train yourself to understand that, should you find yourself in a survival situation, you MUST curb it. Cultivate the ability to do that...
...and then, when it's not a survival situation, ENJOY YOUR CURIOSITY.
The fact that you know it could be deadly means you will probably do fine.
And, should you go hiking in the desert, carry extra water and warm clothing (in case night should catch you). And make sure someone who's not along knows where you will be hiking and when you expect to be back. Check out, and check back in. Then have fun.
League Girl-- Enjoy that trait in your son. Don't squash it.
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"Alas, our dried voices when we whisper together are quiet and meaningless, as wind in dry grass, or rats' feet over broken glass in our dry cellar." --TS Eliot, "The Hollow Men"