- Robert Preidt Latest articles by - Robert Preidt Stem Cell Loss in Aging Brain May Bring Poorer Memory By - Robert Preidt published 23 December 06 Health Sign up for the Live Science daily newsletter nowGet the world’s most fascinating discoveries delivered straight to your inbox.Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors LATEST ARTICLES1'We certainly weren't exceptional, but now we're the only ones left': In new PBS series 'Human,' anthropologist Ella Al-Shamahi explores how humans came to dominate Earth21,900-year-old 'treasure' found in Roman-era family's scorched house in Romania3Skyscraper-size asteroid previously predicted to hit us in 60 years will zoom past Earth on Thursday (Sept. 18) — and you can see it live4Grumpy-looking Pallas's cat photographed by camera trap in stunning photo from eastern Himalayas5Viltrox AF 16mm f/1.8 FE lens review