A recent study found a link between an asteroid/comet impact and the disappearance of 35 mammal species and a flightless bird 3.3 million years ago in southeastern Argentina. The research suggests that the impact may have triggered a climate change, leading to regional extinctions.
Researchers at University of Wisconsin-Madison found that amino acids must attach to transfer RNA (tRNA) in the nucleus for efficient delivery out of the nucleus. This quality-control process, known as proofreading, ensures genetic instructions are complete and ready to function.
Scientists have provided direct evidence that the Earth's innermost core is solid, contradicting a long-held assumption of a liquid core. This finding was made possible by advances in instrumentation and computer capabilities, allowing researchers to detect the characteristic vibrations of a solid core.
A USC-led study shows that photopheresis reduces the number of serious organ rejections in heart transplant patients, potentially allowing for a more targeted therapy. The treatment also appears to have an anti-viral effect, reducing levels of cytomegalovirus (CMV) in the bloodstream.
A new study found that cannibalism among flour beetles regulates population growth and stabilization. By manipulating life stages, researchers demonstrated a link between cannibalism and stable populations.
Researchers at Johns Hopkins School of Public Health discovered that administering itraconazole to HIV-positive patients with P. Marneffei infection can prevent relapse, reducing the risk by 100%. The study showed a 50% relapse rate among untreated patients compared to zero in those treated with itraconazole.