| Zoologists, for example, once believed that studying chimpanzees in a cage would reveal everything about the animal. |
| The net effect is that hunting bonobos, chimpanzees, and gorillas has now become big business. |
| A study in chimpanzees showed lower levels of sexual activity when the females were given oral contraceptives. |
| Seeking a snack, wild chimpanzees dip sticks into an anthill to fish out the insects. |
| Conniff explains that when chimpanzees approach an alpha member, they appear to reduce their body size a bit. |
| Then we discovered tool-using animals, chimpanzees using sticks to dig ants out of anthills. |
