You may or might not have noticed that I haven’t been blogging for over a week; I was in Madrid giving a talk where I tried to help make the point that people don’t discriminate against authors on the basis of nationality, language or any other non-scientific aspect. In a prior entry, I had already shared some data to back again this statement up, and I used the same and additional data during the speak to drive the real point home. It had been quite amusing to observe that some people still didn’t trust me: “sure, I can see that your graphs display that you don’t discriminate, but I don’ still;t believe you”.This roof seals the hole, has an insulating airspace between the two layers of plastic material and allows the suns rays to penetrate creating a warm, steady environment for plant development. The Institute continues with a conclusion of how the earth acts such as a battery, storing heat throughout the day while releasing it during cooler nighttime temperature ranges: Energy and light from sunlight enter the Walipini through the plastic covered roof and so are reflected and absorbed through the entire underground structure. By using translucent material, plastic of glass instead, plant growth is improved as particular rays of the light spectrum that inhibit plant development are filtered out.