New research finds that the appearance of the HbS mutation, which protects against malaria but leads to sickle cell disease when present in two copies, was more common in sperm samples from men in Ghana, where malaria risk is high, than Europeans.
The field of ancient DNA, which combines archaeology and anthropology with cutting-edge genetics, is requiring scientists to have frank conversations about when research is justified and who it benefits.
Epigenetic structures appear to reduce the rate of changes in genes essential for survival and reproduction, a study finds, challenging the notion that mutations are evenly distributed throughout the genome prior to selection.
A thermodynamic analysis of more than 400 chemical reactions that likely took place in the ancestor of all life finds most would spontaneously occur at hydrothermal vents, thanks to the hydrogen these geological formations emit.
Hydra vulgaris constantly replenish the cells in their heads and grow new ones to reproduce asexually. But gene expression analyses reveal that regenerating a head after an injury is a very different process.
A new analysis of fossil footprints suggests that the 2-meter-tall, 4- to 5-meter-long carnivores that left them could run nearly 45 kilometers per hour, bolstering the evidence that at least some dinosaurs were speedy, agile hunters.