Alligator fat can be made into biodiesel (and, yes, they have a lot of fat). Extreme cavers descend into the dark and dangerous depths of Earth's deepest cave. And we tour the original, long-lost SeaWorld that never was. It's time for the week's Landscape Reads!

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Biodiesel Planes (??)

Treehugger discusses the possibility of bio-diesel planes. Apparently, you can just drop a little bio-diesel into low flying planes and travel for miles while wafting chip crease in your wake. However, for larger planes at higher altitudes they suggest a mixture. You don't want your biodiesel turning to Crisco at…