A new study tracing the evolution of same-sex sexual behavior in mammals, using phylogenetic analyses, suggests these behaviors may have evolved in part to strengthen social bonding and relationships.
The Labrador retriever has reigned supreme as the most popular dog in the United States for 31 years, according to the American Kennel Club, which describes the breed as friendly, active and outgoing.
Understanding the evolution of insect mating behavior is essential for explaining how early insects adapted to life on land.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback