Figure 1From: The terrestrial evolution of metabolism and life – by the numbersMetabolic efficiency vs. metabolic recharge rate, with a different curve for each mass. The curves shown are for the numbers highlighted in Additional file 1, and indicate how recharge rate changes for each mass as energy availability fluctuates, or as the ability of that mass to absorb energy changes. Both are expressed as values for metabolic efficiency, the X axis.Back to article page