In r...This suggests that the gonad and the brain are in a synchronized hormo...We think that in mammals a similar communication occurs between the b... <a href="http://www.bio-medicine.org/inc/biomed/biology-news.asp">http://www.bio-medicine.org/inc/biomed/biology-news.asp</a> http://feeds.bio-medicine.org/latest-biology-newsDate:4/23/2008 es, shows that when animals such as flies, worms and mice live longer when they produce or receive less insulin.