Bill Harwood has been covering the U.S. space program full-time since 1984, first as Cape Canaveral bureau chief for United Press International and now as a consultant for CBS News. Pressurized helium ...

Mar. 17, 2026 A key Alzheimer’s drug has finally revealed its secret. Researchers discovered that lecanemab works by activating the brain’s immune cells—but only through a specific part of the ...

Pain is an uncomfortable sensation triggered by nervous system activation, often in response to actual or potential tissue damage. It can feel sharp, dull, burning, or throbbing, and may be localized ...