We’ve all seen the caricature of the sadistic child tormenting ants with his magnifying glass. He aims the sun's rays, focuses them to a point using the glass, and BAM – you have extreme heat!

Hopefully, tormenting innocent insects aren't your thing. Hopefully, you want to utilize the beauty of science and the light of the sun for good, not evil.

A Fresnel lens is a remarkable invention. Created in the 1700’s, the first lens were used for lighthouses, the span of its light capable of reaching a distance of up to 20 miles!

The lenses can also be used as fire starters, or to cook your food in a survival situation (they are significantly more impressive than your standard solar cookers).

And guess what! You can make your own lenses! Take a look at the next page to find out how to build your own Fresnel lens, which are useful to not only save money but utilize solar energy when SHTF!

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