Top news for December 21, 2008

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Eating for hunger or pleasure? Regulating these feeding behaviors involves different brain circuits

Vaccines Don't Cause Male Infertility or Sexual Dysfunction, But COVID-19 Might

Fireball streaks across North Texas, creating light show and sonic boom

Global Dementia Cases Forecasted to Triple by 2050 to More Than 152 Million

As Infections Rise, C.D.C. Urges Some Vaccinated Americans to Wear Masks Again

Space calendar 2022: Rocket launches, sky events, missions & more!

Rocket launch today: SpaceX launching US spy satellite in morning liftoff

On this day in space! Oct. 14, 1947: Chuck Yeager smashes the sound barrier.

Boeing Starliner: Live updates

Steven Weinberg, Groundbreaking Nobelist in Physics, Dies at 88