“Scientists say we have become ‘gracile’ rather than ‘less robust.’
Washington Post(Feb 13, 2016)
Allosaurus possessed a more gracile skull, with curved, serrated teeth.
Reuters(Nov 03, 2015)
The gracile humans bested their more-robust cousins thanks to greater intelligence, social cooperation and adaptability to a changing environment.
Forbes(Jan 17, 2015)