Biologically speaking, many animals besides dogs bark, according to evolutionary biologists, but domestic dogs vocalize in this way much more than birds, deer, monkeys and other wild animals that use barks. The reason is related to dogs' 10,000-year history of hanging around human food refuse dumps, she suggests.
Injections of THC, the active principle of cannabis, eliminate dependence on opiates (morphine, heroin) in rats deprived of their mothers at birth. The findings could lead to therapeutic alternatives to existing substitution treatments.
Patients with atrial fibrillation, common in those with advanced chronic heart failure, have an increased risk of hospitalization due to heart failure, according to new research. The findings also suggest that atrial fibrillation is not associated with an increased risk of death in heart failure patients, contradicting previous assumptions.
Just months before world leaders are scheduled to meet to devise a new international treaty on climate change, scientists have developed a new way of dividing responsibility for carbon emissions among countries. The approach is so fair, according to its creators, that they are hoping it will win the support of both developed and developing nations, whose lea […]
Researchers have found that men and women who feel sensitive to rejection based on their physical appearance are more likely to express interest in having cosmetic surgery than those who are less sensitive to appearance-based rejection. This effect is particularly true when people recall negative comments about their physical appearance.
What is going on in teenagers' brains as their drive for peer approval begins to eclipse their family affiliations? Brain scans of teens sizing each other up reveal an emotion circuit activating more in girls as they grow older, but not in boys. The study shows how emotion circuitry diverges in the male and female brain during a developmental stage in w […]
Elderly people with no memory or thinking problems are more likely to later develop thinking problems if they have a growing amount of "brain rust," or small areas of brain damage, according to a new study.
A study comparing how two common dietary oil supplements affect body composition suggests that both oils, by themselves, can lower body fat in obese postmenopausal women with Type 2 diabetes. The two oils compared were safflower oil, a common cooking oil, and conjugated linoleic acid, a compound naturally found in some meat and dairy products that has been a […]