Kepler-452b revolves around a sun much like our own.
August 28, 2001|
In the August 28 Proceedings of the National Academy of Sciences, Michelle Hamilton and colleagues, at the University of Texas Health Sciences Center, have addressed the question 'Does oxidative damage to DNA increase with age?' (Proc Natl Acad Sci USA 2001, 98:10469-10474).They set out to confirm the 'oxidative stress hypothesis' which postulates that aging results from the irreversible accumulation of oxidative damage. They isolated nuclear DNA (nDNA) and mitochondrial DNA (mtDNA) from multipl