Energy and Human Evolution

Life on Earth is driven by energy. Autotrophs take it from solar radiation and heterotrophs take it from autotrophs. Energy captured slowly by photosynthesis is stored up, and as denser reservoirs of energy have come into being over the course of Earth’s history, heterotrophs that could use more energy evolved to exploit them, Homo sapiens is such a heterotroph; indeed, the ability to use energy extrasomatically (outside the body) enables human beings to use far more energy than any other heterotroph that has ever evolved.

Barry Bonds is in Space

Watching Barry Bonds connect for a homer is a thrill. We are in awe of the distance he can propel a baseball, but we know the ball will land. Why? Gravity, of course. Barry Bonds lives on Earth, not outer space. If he were in space his homers would travel practically forever. What goes up doesn’t necessarily come down, in space.