Researchers at Johns Hopkins Medicine discovered a link between nitric oxide levels and the severity of AIDS dementia. The study found that high levels of nitric oxide synthase in the brains of patients with advanced HIV infection led to brain cell destruction, affecting 20% of those affected.
Scientists are examining population sizes using new statistical methods to determine if they're constant or fluctuating. The study aims to understand the causes of worldwide amphibian decline, which remains a mystery.
Infants as young as 8 months can recognize word patterns and distinguish them from non-word sequences based on statistical recurrence. This ability allows them to quickly learn language, contradicting the long-held assumption that language acquisition relies heavily on innate abilities.
A new study using electron spin resonance dating has pushed back the age of Homo erectus remains to 27,000 to 53,000 years old. This finding challenges the Multiregional theory and supports the Out of Africa model of modern human origins.
Researchers at Stanford University and their colleagues have isolated a single gene, fru, that controls most aspects of male sexual behavior in adult fruit flies. The gene governs the fly's courtship ritual, including its courting song and ability to recognize females.