The trail of disrupted atoms left in the mica by the high - energy particle becomes part of the real world. (discovermagazine.com)
Along with this rigorous distinction of primary from secondary qualities there has often gone a belief that only the primary qualities could be called really real (their persistence throughout accidental changes being the criterion of their reality), and that secondary qualities are not part of the real world. (religion-online.org)
I talk a lot about using gear in moderation when I talk about my «Rule of 2 and 15,» But let's look at that other part of my Real World Solution - your baby's positioning / posture. (candokiddo.com)