Nature 439, 457–461 (2006)
It has been drawn to our attention that the wording used in the first sentence after equation (1) is ambiguous. For the example used to illustrate ¾ power scaling, we implied that if metabolic rate had a body mass scaling exponent of 0.75, a 10-fold increase in size would increase metabolic rate 7.5-fold; however, we were referring to the power-law relationship on a log scale, which should have been clear from the context. A 10-fold increase in mass would therefore increase metabolic rate as a function of 100.75, which is equal to a 5.62-fold increase in metabolic rate. The apparent error in this example has no bearing on the power-law relationship or its interpretation in the paper.
The online version of the original article can be found at 10.1038/nature04282