1.   Before animal shelters and rescue organizations were invented, humane societies were in the business of helping humans.

2.   But a top Harvard researcher of human AIDS vaccines was considerably less sanguine that the cat vaccine might help humans.

3.   He said he believed such crystals helped animals navigate, but doubted that they helped humans.

4.   Learning how to bend those physiology rules could help humans.

5.   Researchers will administer an injection, a drug that one day could help humans in stroke recovery.

6.   The studies also might help infertile humans.

7.   If biologists can discover how that immune system works, it could help humans facing immunodeficiency diseases such as AIDS.

8.   Some of the research has also helped humans.

9.   What is left is humans helping humans.