Why the Latest Science Leads Us to a New Theory of Human Nature, by Jonathan Leaf (Bombardier, 320 pp., $21) Ever since Darwin, biologists have believed that much could be learned about human nature ...

Female sperm discrimination that can bias fertilization outcomes has been observed in animals, but in vivo evidence is lacking in large mammals. This ...

Rhesus macaques in U.S. research laboratories frequently pull out their own hair, pace in tight loops, and rock back and ...

Discover how to launch a rewarding zoo veterinarian career. Learn about DVM requirements, zoological medicine, and daily ...

Discover 15 animals that mate for life, showcasing unique behaviors, loyalty, and partnerships that last a lifetime in the ...

There are only two individuals left today, Najin and Fatu, and they are both female. Because they now cannot reproduce, this ...

When the scientists paired two male octopuses in the same setup, the males interacted by touching arms, but they never ...

Scientists found that the male’s hectocotylus, the specialized arm for mating, is lined with receptors that can sense ...

As humpback whale numbers climb back after decades of large-scale hunting, scientists are spotting strange things. A new study reveals that older males are now more likely to father calves, while ...

Scientists have learned how male octopuses' specialized sperm-depositing arm knows where to go ...

Mild aggression and lethal violence evolved separately, according to research across 100 primate species. The study ...