Despite huge increases in life expectancy in both groups, rich people's lives are still extending faster, academics from Cass Business School and the International Longevity Centre-UK (ILC-UK) found.
Male wild gorillas appear to "hum" or "sing" while eating their favorite food. Since these calls are too quiet to be a sort of "diner bell," researchers suggest they are used to coordinate group feeding activities. In other words, if the food is tasty, males signal to women and younger group members to join in on the good eats.
Killer whales have been studied for the first time in their North Atlantic range. Compared to their Pacific Northwest counterparts that feast on Chinook salmon, the Atlantic dwellers prefer preying on minke whales.
Like bees, ants organize their colonies based on social rank. It appears trap-jaw ants engage in antenna-boxing matches to dictate who guards the colony and who goes out into the world to forage.
Chimpanzees are less inclined to groom one another with numerous bystanders lingering about. This challenges the long-held belief that such cooperative behaviors are based on trust, suggesting they revolve more around immediate benefits.
Dogs can rapidly mimic each other's expressions, just like humans and some primates.
Japanese macaques are exposed to various stressful situations in the wild, including rank fights and mating competitions. Researchers recently took a closer look at how genetics ultimately control the release of stress hormones in these animals.
Female elephants are the matriarchs of their social groups. Researchers discovered that when a female elephant is killed by a poacher, their daughter readily steps in to fill her shoes. This suggests the animals have an unwavering resilience to pressure by humans.
Can certain species of fish – especially specias that all seem to look alike – distinguish between friend from a foe? Apparantly so, say surprised reaserchers who say recongition comes down to small but distinct facial coloring patterns.
While bonobos are often regarded as a less sophisticated species than their close chimpanzee relatives, researchers have documented for the first time that the animals are actually able to create stone tools and weapons like chimpanzees and early humans did.
A suspicious number of young starlings have drowned recently in Europe. While researchers are still unsure why groups of juvenile birds have been drowning, they believe they have some ways to help the inexperienced wild animals access water safely.
Members of both animal and human social groups work together to hunt, forage and fight under the guidance of leader. A recent study took a closer look at the nature of leadership to better understand how human and non-human leaders promote cooperative actions.
Rhesus monkeys rely on their sense of smell more heavily than researchers previously thought, employing it to distinguish between members of their own social groups and those who don't belong.
When wild baboons decide to live in smaller social groups they are less stressed. This also reduces the amount of competition for the same forest resources.