Human evolution

Please post your comments and suggestions for this article.

Comment by Eugene Craig Campbell on July 22nd, 2009 at 6:30 pm

The photo image shows weights of 100g for the monkey, 400g each for the orangutan and chimpanzee, and 1350 for the human. I believe these refer to the brain mass rather than that of the skulls (which seems to be implied). Whatever, it is not specified which or what, and I think it would be better for the caption to mention these weights.

Comment by Rick Swarts on July 23rd, 2009 at 7:10 am

Thank you for your astute observation and feedback. Yes, the labels on the image refer to brain mass. We have revised the article accordingly.

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