Air Pollution in Pakistan’s Largest Province Leaves Hundreds Hospitalized

Observations detect hundreds of possible supergiant stars in two nearby galaxies

Earlier this year experts gathered at the Johns Hopkins Applied Physics Laboratory for the largest, most detailed simulation of an asteroid strike on a US city. North Carolina's city of Winston-­Salem volunteered to be "impacted," and hundreds of state and local officials played the "wargame."

Exposure to particular sources of air pollution is harmful to children's learning and memory