Cycles of wet and dry conditions may have driven the type of chemical reactions that scientists believe were critical to the formation of life on the early Earth.
A study of 338 patients with coronary artery disease has identified a gene expression profile associated with an elevated risk of cardiovascular death.
Researchers have shown that a process called DNA methylation can shield duplicate genes from being removed from the genome during natural selection. The redundant genes survive and are shaped by evolution over time, giving birth to new cellular funct