In the side of what had seemed to be a snow-bank stood a solid-looking little door, painted a dark green.

The Houston Ship Channel is clogged with beef fat. Unlike petroleum, which has a colorful sheen on the water's surface, beef fat turns into a solid cake, looking like a waxy ice flow.

Dr. ALAM: So, the science part, I think, is fairly solid between the different teams doing it, looking at different aspects of it.