| After too long a period of time, we as human beings will begin to seek ways to meet our needs, wants and desires much closer to home. |
| On the other hand, cooling makes acoustic noise, which human beings don't tolerate well. |
| Adolescence is the exciting phase of transition when human beings start developing the cognitive ability to form abstract thoughts. |
| The earth's miraculously complex environment has remained in balance for thousands of years, allowing human beings to thrive. |
| Since they are abject human beings, he implies, he does not have to engage them at that level. |
| Absent a critical cultural adaptation, human beings could never have thrived in the face of this constraint. |
