Rocket Motor Fails to Ignite on Virgin Galactic Test Flight

CDC: Masks Can Protect Wearer from Coronavirus, Too

Moderna On Track to Report COVID-19 Vaccine Late-Stage Trial Data in November

AstraZeneca Resumes Coronavirus Vaccine Study

Is Hot Asphalt Really Increasing Air Pollution?

People Think CPR is More Effective Than It Really Is, Study Finds

Contact Tracing Useless Unless It's Speedy: Even if all contacts are successfully traced, a delay of three days or more between the start of symptoms and testing will not reduce transmission of the virus sufficiently to control further spread.

E-Cigarettes as Bad for Arteries as Regular Smokes, Study Finds

The Pope Suggests Considering a Universal Basic Wage

America Now Has Most COVID-19 Deaths in the World -- 20% of All Fatalities