Eurasia's main axis is east
west, whereas the main axis of the Americas is north
south. Eurasia's east
west axis meant that species domesticated in one part of Eurasia could easily spread thousands of miles at the same latitude, encountering the same day-length and climate to which they were already adapted.
Every candidate running for president has got to answer the following very simple question: At a time when we need to address the planetary crisis of climate change, and transform our energy system away from fossil fuels and into energy efficiency and sustainability, should we continue to give $135 billion in tax breaks and subsidies over the next decade to fossil fuel companies?